Piper Seneca IV Maintenance Manual
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Piper Seneca IV Maintenance Manual

Piper Seneca IV Maintenance Manual

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AIRPLANE MAINTENANCE MANUAL
PA-34-220T
(SN's 3447001 THRU 3447029)
(SN's 3449001 AND UP)
PIPER AIRCRAFT, INC.
PART NUMBER 761-888
February 28, 2009
1A1

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Summary of Contents for Piper Seneca IV

  • Page 1 AIRPLANE MAINTENANCE MANUAL PA-34-220T (SN’s 3447001 THRU 3447029) (SN’s 3449001 AND UP) PIPER AIRCRAFT, INC. PART NUMBER 761-888 February 28, 2009...
  • Page 2 Published by Technical Publications © 1995, 2009 Piper Aircraft, Inc. 2926 Piper Drive Vero Beach, Florida 32960 U.S.A. Member General Aviation Manufacturers Association...

  • Page 3: Revision Status

    Inc. (www.Avantext.com) on CD-Rom or DVD. The CDs/DVDs include applicable Service Bulletins and Service Letters. Consult the “Customer Service Information File" (a free download from the Piper Aircraft, Inc. website at http://www.piper.com/company/publications.asp ) to verify that you have the latest revision.
  • Page 4 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 REVISION STATUS Feb 28/09...
  • Page 5 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL INTRODUCTION LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE Intro-List of Feb 28/09 Effective Pages May 30/07 Intro-Table of Contents Feb 28/09 May 30/07 Introduction May 30/07...
  • Page 6 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 INTRO - LIST OF EFFECTIVE PAGES May 30/07...
  • Page 7 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. Introduction Instructions for Continued Airworthiness General Effectivity 1A10 Serial Number Explanation 1A10 Assignment of Subject Material 1A10 Pagination 1A10A Aerofiche Grid Numbering...
  • Page 8 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 INTRO - CONTENTS May 30/07...
  • Page 9 STRESSES ON ADJACENT STRUCTURES, THE PIPER PROVIDED ICA MAY NOT BE VALID FOR AIRPLANES SO MODIFIED. The PIPER PA-34-220T Seneca IV / V Maintenance Manual constitutes the Instructions for Continued Airworthiness (ICA) as required by Federal Aviation Regulations (FAR) Part 23, Appendix G. Chapter 4 contains the Airworthiness Limitations section (4-00-00) and the Inspection Program is in Chapter 5 (5-20-00).

  • Page 10: Sequence Number

    MAINTENANCE MANUAL Effectivity This maintenance manual is effective for PA-34-220T Seneca IV airplanes, serial numbers 3447001 thru 3447029, and Seneca V airplanes, serial numbers 3449001 and up. This encompasses the following model years: NOTE: The following is provided as a general reference only.
  • Page 11 (explained below) will be used to indicate location within the manual until the next complete revision. Aerofiche Grid Numbering Piper has ceased production of all Aerofiche (i.e., microfiche) products. The Aerofiche grid numbers will be removed in the next complete revision. In the interim, as partial revisions occur, the Aerofiche grid numbering system may be modified, as explained below, to simplify production.
  • Page 12 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Identifying Revised Material 2007 thru 2008: A revision to a page is defined as any change to the printed matter that existed previously. Revisions, additions and deletions are identified by a vertical line (i. e. - change bar) along the left- hand margin of the page opposite only that portion of the printed matter that was changed.
  • Page 13 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK INTRODUCTION PAGE 3 1A11 Feb 28/09...

  • Page 14: Air Conditioning Compressor

    12. Accident/Incident Reporting To improve our Service and Reliability system and aid in Piper’s compliance with FAR 21.3, knowledge of all incidents and/or accidents must be reported to Piper immediately. To expedite and assist in reporting all incidents and accidents, Piper Form 420-01 has been created.
  • Page 15 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) BATTERY: Vendor: GILL Batteries PH: - (800) 456-0070 A Division of Teledyne Continental Motors http://www.gillbatteries.com (4) BRAKES AND WHEELS: Vendor: Parker Hannifin Corp. PH: - (800) 272-5464 Aircraft Wheel and Brake Division...
  • Page 16 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (8) FIRE EXTINGUISHER (PORTABLE): Vendor: H3R Inc. PH: - (800) 249-4289 43 Magnolia Ave # 4 San Francisco, California 94123-2911 http://www.h3r.com/index.htm (9) FUEL CELLS: Vendor: Engineered Fabrics Corporation PH: - (770) 684-7855...

  • Page 17: Oxygen System

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (14) MAGNETOS: Vendor: TCM Aircraft Products PH: - (800) 718-3411 P. O. Box 90 FAX: - (251) 432-7352 Mobile, AL 36601 http://www.tcmlink.com/ Installation, Operation Teledyne Continental Motors (TCM) and Maintenance...
  • Page 18 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (18) STANDBY ATTITUDE INDICATOR: Vendor: Mid-Continent Instruments Co., Inc. PH - (316) 630-0101 9400 E. 34 TH Street N. FAX - (316) 630-0723 Wichita, KS 67226 http://www.mcico.com/index.html Installation Manual and Operating Instructions: Manual No.
  • Page 19 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 14. Chapter/Section Index Guide NOTE: The following GAMA Specification No. 2 standard chapters are not included in this Maintenance Manual: 23, 36, 38, 49, 54, 60, 72, 75, 78, and 83. These chapters are omitted because the subject system is either: not installed in these airplanes;...
  • Page 20 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER SECTION TITLE GRID NO. STANDARD PRACTICES - AIRFRAME 1J13 General Painting ENVIRONMENTAL SYSTEMS General Distribution Heating Cooling AUTOFLIGHT 2G13 Autopilot ELECTRICAL POWER General DC Generation External Power Electrical Load Distribution...
  • Page 21 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER SECTION TITLE GRID NO. ICE AND RAIN PROTECTION General Airfoils Pitot and Static Windows and Windshield Propellers Detection INDICATING / RECORDING SYSTEMS Central Warning Systems LANDING GEAR General Main Gear and Doors...
  • Page 22 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER SECTION TITLE GRID NO. STRUCTURES General Investigation, Cleanup and Aerodynamic Smoothness Repairs Electrical Bonding DOORS 6H15 General Passenger/Crew Cargo FUSELAGE 6I11 Main STABILIZERS General Stabilator Vertical Stabilizer Rudder WINDOWS...

  • Page 23: Integrated Engine Instrument Systems

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER SECTION TITLE GRID NO. ENGINE FUEL AND CONTROL 7G13 Distribution Indicating IGNITION Electrical Power Supply Distribution ENGINE CONTROLS Power Control ENGINE INDICATING 7J11 General Power Temperature Integrated Engine Instrument Systems...
  • Page 24 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 1A22 THRU 1A24 INTENTIONALLY BLANK PAGE 14 INTRODUCTION May 30/07 1A22...
  • Page 25 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Autopilot Conversion Tables Installation Decimal Conversions: 8E17 Access Plates and Panels: 1E24 Pitch Servo: 2H19 Drill Sizes: 8E21 Accident/Incident Reporting: 1A12 Roll Servo: 2H12 Inches to Millimeters: 8E20 Aerofiche Grid Code: 1A11...

  • Page 26: Digital Display Monitoring Panel (Ddmp)

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Electrical Manifold Pressure: 9G20 System Schematics (cont.) Meggitt EFIS Option: 9F9 Component Loads: 2J9 Avionics Annunciator Multi-Function Display (MFD) Description: 2I7 Dimming: 9D13 (Avidyne EFIS): 9F13 Wire Coding: 8F11 Avionics Gear Switches:...
  • Page 27 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Instruments Flaps Troubleshooting: 3G3 CHT Gauge: 7K4 Control System: 3F9 EGT Gauge: 7K3 Installation: 3F10 Engine Instrument & Digital Potentiometer Adjustment: Gyro Horizon: 5D1 Display Monitoring 3F15 Panel: 7K5 Rigging: 3F13...
  • Page 28 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Inspection Requirements: 1C21 Position and Warning: 4J7 Access Provisions: 1E24 Annual / 100 Hour Inspection: Gear Warning Switches Definitions: 1C19 1C21 Manifold Pressure Per Calendar Year: 1D19 Procedure: 1C22 Switches: 4J12...

  • Page 29: Removal And Installation

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Lubrication Refilling: 6D1 Propeller Application of Grease: 1J3 Pressures vs. Temperature: Deice System: 4D17 Application of Oil: 1J3 Brush Assemblies Charts, 1J5 Regulator Valve: 6C18, 6C20 Alignment and Clearance: Swageloc Fitting Installation:...
  • Page 30 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Revisions Stall Warning System Troubleshooting Identifying Revised Material: Flap Microswitch Adjustment: Aileron Control System: 3D5 1A11 Air Conditioning: 2E14 Rivets Flight Test Procedure: 3F5 Airspeed Tubes and Indicator: Removing Cherrylocks: 1J21...
  • Page 31 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Vacuum System Filter: 6D21 Functional Schematic: 6D16 Gauge: 6E3 Pumps: 6D22 Regulators: 6D24 Switches: 6E4 Troubleshooting: 6D12 Vendor Contact Information: 8F7 Publications: 1A12 Vent System: 2C12 Vertical Fin: 6J19 Vertical Speed Indicator: 5C16...
  • Page 32 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 1B8 THRU 1B24 INTENTIONALLY BLANK PAGE 8 INDEX May 30/07...

  • Page 33: Airworthiness Limitations

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER AIRWORTHINESS LIMITATIONS...
  • Page 34 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK...
  • Page 35 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 4 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 4-List of Feb 28/09 Effective Pages May 30/07 4-Table of Contents Feb 28/09 May 30/07 4-00-00...

  • Page 36: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 4 - LIST OF EFFECTIVE PAGES May 30/07...
  • Page 37 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 4 - AIRWORTHINESS LIMITATIONS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. AIRWORTHINESS LIMITATIONS 4-00-00 Limitations Inspections Major Repairs to Life Limited Components Life Limited Parts Marking and Disposition...
  • Page 38 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 4 - CONTENTS May 30/07...
  • Page 39 43.10 in a manner that does not affect part structural integrity, i.e. - no surface deformation such as vibration/etching allowed. Parts that have accumulated the life limit shall be disposed of in accordance with the applicable FARs. Piper recommends life limited parts with no time and/or cycles remaining be completely destroyed. 4-00-00...
  • Page 40 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 4-00-00 May 30/07...

  • Page 41: Time Limits / Maintenance Checks

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER TIME LIMITS / MAINTENANCE CHECKS...
  • Page 42 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 1C10...
  • Page 43 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 5 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 5-30-00 Feb 28/09 5-List of Feb 28/09 Effective Pages May 30/07 Feb 28/09 Feb 28/09 5-Table of Contents...
  • Page 44 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 5 - LIST OF EFFECTIVE PAGES May 30/07 1C12...
  • Page 45 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 5 - TIME LIMITS / MAINTENANCE CHECKS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 5-00-00 1C15 TIME LIMITS 5-10-00 1C17 SCHEDULED MAINTENANCE 5-20-00 1C19 Description 1C19 Definitions...
  • Page 46 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 5 - CONTENTS May 30/07 1C14...
  • Page 47 MAINTENANCE MANUAL GENERAL Piper Aircraft, Inc. (Piper) takes a continuing interest in having the owner get the most efficient use from his airplane, and keeping the airplane in the best mechanical condition. To that end, Piper publishes a recurring maintenance schedule which is supplemented with Service Bulletins, Service Letters and Service Spares Letters as required.
  • Page 48 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 5-00-00 May 30/07 1C16...

  • Page 49: Time Limits

    Refer to 5-20-00 for Piper’s recommended Inspection Programs. They include the frequency and extent of the inspections required for the continued airworthiness of these airplanes. Inspections required by Flight Hour or Calendar Year, if due, are included as part of the Annual / 100 Hour Inspection and/or the Progressive Inspection Event cycles, and are listed individually in 5-30-00.
  • Page 50 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 5-10-00 May 30/07 1C18...

  • Page 51: Scheduled Maintenance

    RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) The recurring maintenance schedule for the PA-34-220T Seneca IV / V is provided herein as an Annual / 100 Hour Inspection. A Progressive Inspection Program will be available from Piper Dealers in a separate manual form.
  • Page 52 Each bench test will be performed by a Piper Service Center, FAA Certified Repair Station with appropriate rating or by a certified mechanic. This test will be performed at the scheduled interval regardless of any bench test performed on a particular component while being repaired/overhauled before scheduled interval bench test.
  • Page 53 Piper Dealers: P/N 767-006, Progressive Inspection Manual (50 Hour). Refer to Piper's Customer Service Information Aerofiche P/N 1753-755 for a checklist to ensure obtaining latest issue. NOTE: The 50 Hour Progressive Inspection Manual (P/N 767-006) referenced above is not a stand-alone document.
  • Page 54 To help in the performance of periodic inspections, Inspection Report forms are available through Piper Dealers: P/N 767-012 for the PA-34-220T Seneca IV, (S/N's 3447001 thru 3447029) and Seneca V. NOTE: Service centers conducting Part 91 Annual / 100 Hour Inspections can use the Inspection Report Form (P/N 767-012), as a working check-off list, provided they verify its currency against an up-to-date copy of the ICA (i.e.
  • Page 55 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 5-20-00 PAGE 5 1C23 May 30/07...
  • Page 56 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 6 5-20-00 May 30/07 1C24...

  • Page 57: Propeller Group

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Scheduled Maintenance Refer to Notes 1, 2, 3, and 4 before performing the following inspections. Inspection NATURE OF INSPECTION Interval (Hrs) PROPELLER GROUP WARNING: USE EXTREME CAUTION WHEN ROTATING PROPELLER BY HAND;...
  • Page 58 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Scheduled Maintenance (continued) Inspection NATURE OF INSPECTION Interval (Hrs) ENGINE GROUP (CONTINUED) 7. Inspect oil temperature sender unit for leaks and security ....8. Inspect oil lines and fittings for leaks, security, chafing, dents, and cracks.
  • Page 59 45. Lubricate per Lubrication Chart, 12-20-00......... (Seneca IV only) Inspect engine set-up per TCM SID97-3C or later. See also 76-10-00, Seneca IV, Engine Setup Procedures ....(Seneca V only) Inspect engine set-up per 76-10-00, Seneca V, Engine Setup Procedures ........
  • Page 60 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Scheduled Maintenance (continued) Inspection NATURE OF INSPECTION Interval (Hrs) CABIN AND COCKPIT GROUP 1. Inspect cabin entrance doors, cargo, and baggage doors for damage and operation. Check condition and security of locks, latches and hinges (See Note 45.) .......................
  • Page 61 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Inspection NATURE OF INSPECTION Interval (Hrs) FUSELAGE AND EMPENNAGE GROUP (CONTINUED) 10. Check air conditioning system for refrigerant leaks. (See Note 12.)...... 11. Check refrigerant level in sight gauge of receiver-dehydrator. (See Note 12 and 21-50-00.).......................
  • Page 62 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Scheduled Maintenance (continued) Inspection NATURE OF INSPECTION Interval (Hrs) WING GROUP 1. Remove inspection plates and fairings ..............2. Inspect wing surfaces and tips for damage, loose rivets, and condition of walkway.
  • Page 63 NATURE OF INSPECTION Interval (Hrs) LANDING GEAR GROUP NOTE: The following inspections incorporate the requirements of Piper Service Bulletin (PSB) No. 1123B. Any later revisions to PSB No. 1123 must be complied with separately. See also AD 2005-13-16. 1. Check oleo struts for proper extension and evidence of fluid leakage.

  • Page 64: Special Inspection

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Scheduled Maintenance (continued) Inspection NATURE OF INSPECTION Interval (Hrs) LANDING GEAR GROUP (CONTINUED) 28. Remove triangular shaped, nose gear strut servicing access panel located in the forward baggage compartment. Inspect nose tiller roller, steering arm channel and tiller track for condition ..
  • Page 65 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Inspection NATURE OF INSPECTION Interval (Hrs) OPERATIONAL INSPECTION NOTE: Refer to Note 10 prior to making operational checks. 1. Check fuel pump and fuel tank selector ..........2. Check fuel quantity, pressure and flow readings .......
  • Page 66 MAINTENANCE MANUAL Scheduled Maintenance (continued) NOTES 1. Refer to Piper's Customer Service Information File (a free download from the Piper Aircraft, Inc. website at http://www.piper.com/company/publications.asp) for latest revision dates to Piper Inspection Repor ts/Manuals and this maintenance manual. References to Chapter/Section are to the appropriate Chapter/Section in this manual.
  • Page 67 Piper Service Bulletin No. 988. In Seneca IV S/N’s 3447001 thru 3447029 and Seneca V S/N’s 3449002 thru 3449034 only, verify compliance with Piper Service Bulletin No. 1014.
  • Page 68 In Seneca IV S/N’s 3447001 thru 3447029 and Seneca V S/N’s 3449002 thru 3449078 only, verify compliance with Piper Service Bulletin No. 1022. In Seneca IV S/N’s 3447001 thru 3447029 and Seneca V S/N’s 3449002 thru 3449063 and 3449066 only, verify compliance with Piper Service Bulletin No. 1023.
  • Page 69 3449300, verify compliance with Piper Service Bulletin No. 1146. In Seneca IV and V with Pitch servos Part No. 0107 and 0108 installed after Nov. 1, 2005: verify compliance with S-TEC Service Bulletin No. 06-001 per Piper Vendor Service Publication No.
  • Page 70 August 22, 2006 or had a Precision Airmotive part number 365533 gasket installed since August 22, 2006, verify compliance with Precision Airmotive Service Bulletin PRS-107, Rev. 1, per Piper Service Bulletin No. 1191. For airplanes equipped with Avidyne Entegra EFIS, verify compliance with Avidyne Service Alert SA-08-001 per Piper Vender Service Publication No.
  • Page 71 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 5-20-00 PAGE 21 1D15 May 30/07...
  • Page 72 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 22 5-20-00 May 30/07 1D16...

  • Page 73: Special Inspections

    MAINTENANCE MANUAL SPECIAL INSPECTIONS WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) The following inspections are required in addition to those listed in 5-20-00. These inspections are required at intervals of: Flight hours;...
  • Page 74 In Seneca IV S/N’s 3447001 thru 3447029 and Seneca V S/N’s 3449001 thru 3449322 only; for airplanes which have not installed Piper Kits No. 767-397 (LH) and 767-398 (RH) or do not have wing rib assemblies with date codes of 8313 or higher aft of the main spar at W.S. 49.50: conduct 500 Hour Wing Rib Inspection, 57-10-00.
  • Page 75 THE NEW PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Each 2000 Hours Each 2000 hours or seven (7) year, whichever occurs first, remove interior cabinets, panels, and headliner and conduct detailed inspection of aircraft structure (skin, bulkheads, stringers, etc.) for condition and security.
  • Page 76 THE NEW PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2B 5-30-00 Feb 28/09 1D18B...
  • Page 77 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Each 2400 Hours Overhaul or replace Hartzell propellers each five (5) or six (6) years or each 2000 or 2400 hours. (Refer to latest revision of Hartzell Service Letter No. 61 to determine specific requirements for individual airplanes.)
  • Page 78 79553-000/-001 or 62522-000/68257-000, as applicable, for signs of corrosion. Replace fuel tank flexible hose interconnect couplings (Seneca IV only) and fuel tank vent line flexible hose and hose couplings as required, but not to exceed 7 years, 1000 hours, or fuel tank removal, whichever comes first.
  • Page 79 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Each Eight (8) Years Replace engine compartment flexible hoses (fuel, oil, etc.) as required; but not to exceed 1000 hours time-in-service, eight (8) years, or engine overhaul, whichever comes first; except for TSO-C53a - Type D hoses which are replaced on-condition.
  • Page 80 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Operation in High Salt or High Humidity Environment Item Inspection Inspection Interval Fuselage, Empennage, Remove floor panels and exterior 200 Hours. Wings, and Control access plates; inspect for corrosion. Surfaces.
  • Page 81 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Operation from Soft or Unusual Terrain Item Inspection Inspection Interval Landing Gear. Inspect for cracks, attachment, 100 Hours. damage, cleanliness and lubrication. Wheels. Inspect for cracks, damage, chipped 100 Hours.
  • Page 82 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 8 5-30-00 May 30/07 1D24...

  • Page 83: Unscheduled Maintenance Checks

    MAINTENANCE MANUAL UNSCHEDULED MAINTENANCE CHECKS WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) The following inspections are required in response to specific anomalies encountered during aircraft operation.
  • Page 84 Make a preliminary inspection of checking alignment and out-of-track condition of engine, wings, tail, landing gear and doors. Follow Piper and Teledyne Continental Motors Maintenance Manual procedures. If there are any questions regarding repairs or procedures, contact your Piper Dealer’s Service Advisor (DSA).
  • Page 85 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Severe Turbulence, Hard or Overweight Landing (continued) Item Inspection Inspection Interval Wings. Wing attach bolts for slippage, damage Each occurrence, and overstress. Upper and lower wing before further flight. skins for wrinkles, cracks, popped or loose rivets.
  • Page 86 MANUFACTURER'S MAINTENANCE MANUAL, AND FAR PART 43. PAY PARTICULAR ATTENTION TO SILT, CORROSION AND CONTAMINANTS. Follow Piper and Teledyne Continental Motors Maintenance Manual procedures. If there are any questions regarding repairs or procedures, contact your Piper Dealer’s Service Advisor (DSA).
  • Page 87 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Flood Damage, Immersion in Water (continued) Item Inspection Inspection Interval Engine. Remove, disassemble, and inspect. If immersed, each event, Examine all parts paying particular before further flight. attention for evidence of corrosion,...
  • Page 88 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Flood Damage, Immersion in Water (continued) Item Inspection Inspection Interval Electrical Systems. Replace all circuit breakers and If immersed, each event, switches. before further flight. Replace all solenoids, relays and master contactors.
  • Page 89 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Flood Damage, Immersion in Water (continued) Item Inspection Inspection Interval Vacuum and Pitot-Static Replace gyros. If immersed, each event, Systems. before further flight. Replace filters. Clean and inspect all lines, and pitot and static vents.
  • Page 90 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Flood Damage, Immersion in Water (continued) Item Inspection Inspection Interval Oxygen System. Disconnect all lines from source and If immersed, each event, (If installed.) outlets; clean all fittings and lines before further flight.
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  • Page 93: Dimensions And Areas

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER DIMENSIONS AND AREAS 1E11...
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  • Page 95 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 6 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 6-List of May 30/07 Effective Pages May 30/07 6-Table of Contents May 30/07 May 30/07 6-00-00...

  • Page 96: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 6 - LIST OF EFFECTIVE PAGES 1E14 May 30/07...
  • Page 97 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 6 - DIMENSIONS AND AREAS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 6-00-00 1E17 Leading Particulars and Principal Dimensions 1E18 Station Reference Lines 1E22 Access and Inspection Provisions...
  • Page 98 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 6 - CONTENTS May 30/07 1E16...
  • Page 99 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL The principal airplane dimensions are shown in Figure 1, and the leading particulars/principal dimensions are listed in Chart 1. The airplane serial number is located on the Manufacturers Aircraft Association (MAA) plate located on the left side of the fuselage at approximately F.S.
  • Page 100 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Leading Particulars and Principal Dimensions CHART 1 (Sheet 1 of 4) LEADING PARTICULARS AND PRINCIPAL DIMENSIONS MODEL PA-34-220T SENECA IV ENGINE Manufacturer Continental Model - Left (24V) TSIO-360-KB (CW) Model - Right (24V)

  • Page 101: Fuel System

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 4) LEADING PARTICULARS AND PRINCIPAL DIMENSIONS MODEL PA-34-220T SENECA IV PROPELLER Manufacturer Hartzell McCauley Hub Model: Left Engine BHC-C2YF-2CKUF (Left Eng.) 3AF32C508 Right Engine BHC-C2YF-2CLKUF (Right Eng.)
  • Page 102 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 3 of 4) LEADING PARTICULARS AND PRINCIPAL DIMENSIONS MODEL PA-34-220T SENECA V ENGINE Manufacturer Continental Model - Left (24V) TSIO-360-RB (CW) Model - Right (24V) LTSIO-360-RB (CCW)
  • Page 103 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 4 of 4) LEADING PARTICULARS AND PRINCIPAL DIMENSIONS MODEL PA-34-220T SENECA V PROPELLER Manufacturer Hartzell McCauley Hub Model: Left Engine BHC-J2YF-2CUF (Left Eng.) 3AF32C522 Right Engine BHC-J2YF-2CLUF (Right Eng.)
  • Page 104 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Station Reference Lines To facilitate locating various components and structural members in the airplane, a method using fuselage station (FS), wing station (WS), buttock line (BL), or waterline (WL) designations is frequently employed in this manual.
  • Page 105 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Station Reference Lines SENECA V Figure 2 (Sheet 2 of 2) 6-00-00 PAGE 7 1E23 May 30/07...
  • Page 106 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Access And Inspection Provisions CAUTION: BEFORE ENTERING THE AFT SECTION OF THE FUSELAGE, BE SURE THE AIRPLANE IS SUPPORTED AT THE TAIL SKID. The access and inspection provisions for the airplane are shown in Figure 3. The component to be serviced or inspected through each opening is identified in the illustration.
  • Page 107 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Access Plates and Panels Figure 3 (Sheet 2 of 2) 6-00-00 PAGE 9 May 30/07...
  • Page 108 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 10 6-00-00 May 30/07...
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  • Page 111: Lifting And Shoring

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER LIFTING AND SHORING...
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  • Page 113 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 7 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 7-List of May 30/07 Effective Pages May 30/07 7-Table of Contents May 30/07 May 30/07 7-10-00...

  • Page 114: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 7 - LIST OF EFFECTIVE PAGES May 30/07...
  • Page 115 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 7 - LIFTING AND SHORING TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. JACKING 7-10-00 1F11 7 - CONTENTS PAGE 1 May 30/07...
  • Page 116 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 7 - CONTENTS May 30/07 1F10...
  • Page 117 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL JACKING Jacking the airplane is necessary to service the landing gear and other operations. The jacking operation is normally performed using tripod jacks. In other situations (i.e. - emergency, post-accident lifting, etc.), slings or air bags may be more appropriate.
  • Page 118 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 7-10-00 May 30/07 1F12...

  • Page 119: Leveling And Weighing

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER LEVELING AND WEIGHING 1F13...
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  • Page 121 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 8 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 8-List of May 30/07 Effective Pages May 30/07 8-Table of Contents May 30/07 May 30/07 8-10-00...
  • Page 122 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 8 - LIST OF EFFECTIVE PAGES 1F16 May 30/07...
  • Page 123 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 8 - LEVELING AND WEIGHING TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. WEIGHING 8-10-00 1F19 LEVELING 8-20-00 1F21 8 - CONTENTS PAGE 1 1F17 May 30/07...
  • Page 124 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 8 - CONTENTS May 30/07 1F18...
  • Page 125 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL WEIGHING The airplane may be weighed by the following procedure (see Figure 1): Position a scale and ramp in front of each of the three wheels. Secure the scales from rolling forward and tow the airplane up onto the scales. (See Towing, 9-10-00.)
  • Page 126 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 8-10-00 May 30/07 1F20...
  • Page 127 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL LEVELING All configurations of the airplane are provided with a means for longitudinal and lateral leveling. The airplane may be leveled while on jacks, during the weighing procedure while the wheels are on scales, or while the wheels are on the ground.
  • Page 128 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 1F22 THRU 1F24 INTENTIONALLY BLANK PAGE 2 8-20-00 May 30/07 1F22...

  • Page 129: Towing And Taxiing

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER TOWING AND TAXIING...
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  • Page 131 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 9 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 9-List of May 30/07 Effective Pages May 30/07 9-Table of Contents May 30/07 May 30/07 9-10-00...
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  • Page 133 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 9 - TOWING AND TAXIING TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. TOWING 9-10-00 TAXIING 9-20-00 9 - CONTENTS PAGE 1 May 30/07...
  • Page 134 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 9 - CONTENTS May 30/07...
  • Page 135 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL TOWING Before towing airplane, ground personnel must be informed by a qualified pilot or other qualified personnel about tow turning limits of nose gear and any other system functions required to properly and safely move the airplane.
  • Page 136 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Airplane Turning Radius Figure 1 PAGE 2 9-10-00 May 30/07...
  • Page 137 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL TAXIING Before attempting to taxi the airplane, ground personnel should be checked out by a qualified pilot or other responsible person. Engine starting and shutdown procedures should be covered as well. When it...
  • Page 138 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 9-20-00 May 30/07 1G10...

  • Page 139: Parking And Mooring

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER PARKING AND MOORING 1G11...
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  • Page 141 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 10 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 10-List of May 30/07 Effective Pages May 30/07 10-Table of Contents May 30/07 May 30/07 10-10-00...
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  • Page 143 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 10 - PARKING AND MOORING TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. PARKING 10-10-00 1G17 Parking 1G17 Locking Airplane 1G17 MOORING 10-20-00 1G19 10 - CONTENTS PAGE 1...
  • Page 144 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 10 - CONTENTS May 30/07 1G16...
  • Page 145 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL PARKING Parking When parking the airplane, ensure that it is sufficiently protected against adverse weather conditions and presents no danger to other aircraft. When parking the airplane for any length of time or overnight, it is recommended that it be moored.
  • Page 146 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 10-10-00 May 30/07 1G18...
  • Page 147 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MOORING CAUTION: WHEN MOORING, USE SQUARE OR BOWLINE KNOTS. DO NOT USE SLIP KNOTS. The airplane is moored to ensure its immovability, protection, and security under various weather conditions. Head the airplane into the wind, if possible.
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  • Page 149: Placards And Markings

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER PLACARDS AND MARKINGS 1G21...
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  • Page 151 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 11 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 11-List of Feb 28/09 Effective Pages May 30/07 11-Table of Contents Feb 28/09 May 30/07 11-00-00...
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  • Page 153 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 11 - PLACARDS AND MARKINGS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 11-00-00 Self Adhesive Placards, Nameplates and Decals Meyercord Decals EXTERIOR PLACARDS AND MARKINGS 11-20-00 INTERIOR PLACARDS...
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  • Page 155 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL Self-Adhesive Placards, Nameplates and Decals (PIR-PPS65103, Rev. A) Installation (1) Temperature should be 55° _ 90° F for proper adhesion. (2) Wipe the area where the item is to be installed with a clean cloth (P/N 280-686) soaked with isopropyl alcohol (P/N 179-918) Dry with a clean dry cloth (P/N 280-686) before the alcohol has time to evaporate from the surface.
  • Page 156 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (6) Wait approximately 30 to 60 seconds, then slide the backing paper off and wipe up the excess solution with a damp cloth. NOTE: Any attempt to squeegee the item after the premask is removed will cause shiny marks, blemishing the items background.

  • Page 157: Exterior Placards And Markings

    Should a question arise concerning the care of the airplane, it is important to include the airplane serial number in any correspondence to your Piper Dealer’s Service Advisor (DSA). NOTE: Any time an airplane is repainted or touched up, inspect all placards to ensure that they are not covered with paint, are legible, and securely attached.
  • Page 158 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Exterior Placards and Markings Figure 1 PAGE 2 11-20-00 Feb 10/08...

  • Page 159: Interior Placards

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL INTERIOR PLACARDS Interior Placards Figure 1 (Sheet 1 of 7) 11-30-00 PAGE 1 Feb 10/08...
  • Page 160 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Interior Placards Seneca IV Figure 1 (Sheet 2 of 7) PAGE 2 11-30-00 Feb 10/08...
  • Page 161 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Interior Placards 3449001 thru 3449177, Figure 1 (Sheet 3 of 7) less 3449161 11-30-00 PAGE 3 Feb 10/08...
  • Page 162 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 87290 BM NO SMOKING NIGHT PRESS TO TEST N0000 AVOID CONTINUOUS GROUND OPERATION 1600-2100 RPM IN CROSS/TAIL WIND. AVOID CONTINUOUS OPERATION 1900-2100 RPM ABOVE 32" MANIFOLD PRESSURE ELEV TRIM TRIM...
  • Page 163 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 87290 BM NO SMOKING NIGHT PRESS TO TEST AVOID CONTINUOUS GROUND OPERATION 1600-2100 RPM IN CROSS/TAIL WIND. AVOID CONTINUOUS OPERATION 1900-2100 RPM ABOVE 32" MANIFOLD PRESSURE V 139 AT 4750 LBS...
  • Page 164 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 87290 BN NO SMOKING NIGHT PRESS TO TEST AVOID CONTINUOUS GROUND OPERATION 1600-2100 RPM NXXXXX IN CROSS/TAIL WIND. AVOID CONTINUOUS OPERATION STORMSCOPE NOT TO BE USED FOR 1900-2100 RPM ABOVE 32" MANIFOLD PRESSURE THUNDERSTORM AREA PENETRATION ELEV.
  • Page 165 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Interior Placards Figure 1 (Sheet 7 of 7) 11-30-00 PAGE 7 1H13 Feb 10/08...
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  • Page 169 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER SERVICING 1H17...
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  • Page 171 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 12 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 12-20-00 May 30/07 12-List of May 30/07 Effective Pages May 30/07 May 30/07 May 30/07 12-Table of Contents...

  • Page 172: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 12 - LIST OF EFFECTIVE PAGES 1H20 May 30/07...
  • Page 173 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 12 - SERVICING TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 12-00-00 Aircraft Finish Care Dupont Imron 6000 Paint System Cleaning Cleaning Exterior Surfaces Engine Compartment Landing Gear...
  • Page 174 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 12 - SERVICING TABLE OF CONTENTS (continued) SUBJECT SECTION PAGE GRID NO. SCHEDULED SERVICING 12-20-00 1I23 Servicing Steering Bungees 1I23 Induction Air Filter 1I24 Alternate Air Door 1I24 Electrical System...
  • Page 175 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 12 - CONTENTS PAGE 3 1H23 May 30/07...
  • Page 176 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 4 12 - CONTENTS May 30/07 1H24...
  • Page 177 Avoid abrasive cleaners, chemicals, abrasive wax, or brushes. (g) Have paint nicks or scratches touched up as soon as possible to maintain the aircraft's corrosion protection. To summarize,Piper airplanes using the new Dupont paint system need special attention in the early days of ownership. 12-00-00...
  • Page 178 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Cleaning WARNING: DO NOT USE GASOLINE, KEROSENE, ALCOHOL, BENZENE, CARBON TETRACHLORIDE, THINNER, ACETONE OR WINDOW CLEANING SPRAYS TO CLEAN AIRPLANE. CAUTION: IF PAINT IS LESS THAN SIX MONTHS, SEE “DUPONT IMRON 6000 PAINT SYSTEM,”...
  • Page 179 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Landing Gear (1) Struts and Torque Links Before cleaning the landing gear struts and torque links, remove wheel pants and place a plastic cover or similar material over the wheel and brake assembly.
  • Page 180 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Cleaning Interior WARNING: SOLVENT CLEANERS REQUIRE ADEQUATE VENTILATION. (1) Vinyl interior surfaces may be cleaned with a damp cloth and mild soap and water solution. (2) Leather may be cleaned with a mild hand soap and water solution or with a saddle soap.
  • Page 181 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Cleaning Surface Deicing Equipment The deice boots should be cleaned when the aircraft is washed using a mild soap and water solution. In cold weather, wash the boots with the airplane inside a warm hangar if possible. If the cleaning is to be done outdoors, heat the soap and water solution before taking it out to the airplane.
  • Page 182 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 6 12-00-00 May 30/07...
  • Page 183 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 12-00-00 PAGE 7 May 30/07...
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  • Page 185 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL REPLENISHING Service Points Figure 1 12-10-00 PAGE 1 May 30/07...
  • Page 186 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Fuel System Fuel Filter At intervals of 50 hours or 90 days, whichever comes first, clean the fuel screen/filter (i.e. - strainer). The filter in the bowl of the fuel selector valve (refer to Figure 2) is located under the floorboard aft of the main spar and accessed from below the airplane through an access plate.
  • Page 187 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Fuel Tanks (1) Filling CAUTION: WHEN USING ADDITIVES, MAKE SURE THE CORRECT PROCEDURES ARE FOLLOWED. WHEN REFUELING, OBSERVE ALL SAFETY PRECAUTIONS AND USE FUEL SPECIFIED ON FILLER PLACARD. CAUTION: MAKE SURE THAT ANTI-ICING ADDITIVE IS DIRECTED INTO THE FLOWING FUEL STREAM, STARTING AFTER, AND STOPPING BEFORE THE FUEL FLOW.
  • Page 188 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (b) Place a container under the fuel selector valve drain. Depress the quick drain handle and allow a sufficient amount of fuel to drain from the strainer. NOTE: The fuel selector should be positioned in the following sequence while draining the strainer: “OFF,”...
  • Page 189 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Oil Sump NOTE: Warm the engine to operating temperature before draining to ensure complete drainage. (1) Draining To drain the oil sump, provide a suitable container with a minimum capacity of that required to fill the sump.
  • Page 190 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (b) When changing from straight mineral oil to compounded oil, the following precautionary steps should be taken: Do not add additive oil to straight mineral oil. Drain the straight mineral oil from the engine and fill with additive oil.
  • Page 191 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL WARNING: DO NOT RELEASE AIR BY REMOVING THE STRUT VALVE CORE OR FILLER PLUG. DEPRESS THE VALVE CORE PIN UNTIL STRUT CHAMBER PRESSURE HAS DIMINISHED. CAUTION: DIRT AND FOREIGN PARTICLES ACCUMULATE AROUND THE FILLER PLUGS OF THE LANDING GEAR STRUTS.
  • Page 192 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL With strut compressed, remove filler plug to determine that the fluid level is visible up to the bottom of filler plug hole. Install core in filler plug. Apply an appropriate thread lubricant to threads of filler plug and install plug in top of strut housing.
  • Page 193 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (b) Method II (Filling completely empty struts.): Remove the filler plug from the top of the strut housing. Raise the strut to full compression. Pour fluid from a clean container through the filler opening until it is visible at the top of the strut chamber.
  • Page 194 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Draining Brake System (1) Connect a hose to bleeder fitting on the bottom of the cylinder. (2) Place other end of hose in a suitable container. (3) Open bleeder fitting and slowly pump hand brake lever and appropriate brake pedal until fluid ceases to flow.
  • Page 195 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Hydraulic System The hydraulic pump and landing gear actuating cylinders should be checked for leaks, tightness of line fittings and general condition. The cylinder rods are to be free of all dirt and grit. To clean the rods. use an oil soaked rag and carefully wipe them.
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  • Page 199: Scheduled Servicing

    PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL SCHEDULED SERVICING Routine cleaning and lubrication of the airplane and its component parts will significantly extend its service life and reduce the frequency of repairs. Servicing Steering Bungees At the specified frequency according to the Lubrication Chart, the steering bungees must be serviced as follows: Remove the access panels located in the forward baggage compartment.
  • Page 200 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Induction Air Filter Check induction air filter each 50 hour maintenance inspection. Clean or replace if found to be dirty. Replace the filter after one year, ten cleanings or 500 flight hours, whichever comes first.
  • Page 201 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Tire Balance Proper balancing is critical for the life of aircraft tires. If a new tire is balanced upon installation it will usually remain balanced for the life of the tire without having any shimmy or flat spots. An inexpensive balancer can be made that will balance almost any tire for light aircraft.
  • Page 202 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) When reassembling the wheel, powder the inside of the tire. Mount the tire on the valve side of the wheel in the same position it was in when it was balanced. Install the other wheel half, aligning the chalk marks.
  • Page 203 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Airframe Lubrication Proper lubrication procedures are valuable for prolonging the service life of the airplane and as a means of reducing the frequency of extensive and expensive repairs. The periodic application of recommended lubricants to their relevant bearing surfaces, combined with cleanliness, as detailed in the following paragraphs, ensures maximum efficiency and utmost service of all moving parts.
  • Page 204 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Lubrication Charts The lubrication charts consist of individual illustrations for the various aircraft systems, and each component to be lubricated is indicated by a number, the type of lubricant and the frequency of application.
  • Page 205 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL COMPONENT LUBRICANT FREQUENCY 1. MAIN GEAR PIVOT POINTS (See Spec. Instr. 3) MIL-G-81322 100 HRS 2. MAIN GEAR DOOR HINGE MIL-L-7870 100 HRS 3. MAIN GEAR TORQUE LINKS MIL-L-7870 100 HRS 4.
  • Page 206 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL COMPONENT LUBRICANT FREQUENCY 1. NOSE GEAR STRUT HOUSING MIL-G-81322 100 HRS 2. NOSE GEAR PIVOT POINT AND HYDRAULIC CYLINDER ROD END MIL-L-7870 100 HRS 3. NOSE GEAR DOOR RETRACTION MECHANISM...
  • Page 207 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CAUTION: DO NOT LUBRICATE CONTROL WHEEL SHAFT OR BUSHING. CLEAN ONLY WITH ALCOHOL OR OTHER SUITABLE SOLVENT. COMPONENT LUBRICANT FREQUENCY 1. FLAP HINGE BEARINGS MIL-L-7870 100 HRS 2. RUDDER TRIM SCREWS...
  • Page 208 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL COMPONENT LUBRICANT FREQUENCY 1. AILERON HINGE PINS MIL-L-7870 100 HRS 2. AILERON HINGE PINS MIL-L-7870 100 HRS 3. CONTROL CABLE PULLEYS MIL-L-7870 100 HRS 4. STABILATOR TRIM SCREW MIL-G-81322 100 HRS 5.
  • Page 209 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL COMPONENT LUBRICANT FREQUENCY 1. ENGINE OIL SUMPS SEE CONTINENTAL SPEC. MHS-24A AND LATEST REVISION OF SERVICE INFORMATION LETTER 99-2B. 100 HRS 2. OIL FILTERS SEE SPECIAL INSTRUCTIONS NO. 2 AND 3 50 HRS 3.
  • Page 210 PIPER AIRCRAFT, INC.. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL COMPONENT LUBRICANT FREQUENCY 1. FORWARD BAGGAGE DOOR MIL-L-7870 100 HRS 2. LATCH MECHANISM MIL-G-7711 500 HRS 3. PILOT AND COPILOT SEAT ADJUSTMENT MIL-L-7870 100 HRS 4. MAIN DOOR HINGES AND LATCH MECHANISM...
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  • Page 213: Standard Practices - Airframe

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER STANDARD PRACTICES - AIRFRAME 1J13...
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  • Page 215 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 20 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 20-List of Feb 28/09 Effective Pages May 30/07 20-Table of Contents Feb 28/09 May 30/07 20-00-00...

  • Page 216: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 20 - LIST OF EFFECTIVE PAGES 1J16 May 30/07...
  • Page 217 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 20 - STANDARD PRACTICES - AIRFRAME TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 20-00-00 1J19 Description 1J19 Torque Wrenches 1J19 Installing Rod End Bearings 1J21 Removing Cherrylock Rivets...
  • Page 218 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 20 - CONTENTS May 30/07 1J18...
  • Page 219 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL Description This chapter contains general information pertaining to standard aircraft hardware installation and removal practices. For standard repair practices of a minor nature, refer to AC 43.13-1 (latest revision).
  • Page 220 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Torque Wrench Formula Figure 1 Installing Rod End Bearings Figure 2 PAGE 2 20-00-00 May 30/07 1J20...
  • Page 221 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Installing Rod End Bearings Install rod end bearings as shown in Figure 2. Removing Cherrylock Rivets Use following procedure to remove cherrylock rivets: To remove from thick material, use a tapered steel drift pin to drive out rivet stem.
  • Page 222 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Identification of Fluid Lines (See Figure 4.) Aircraft fluid lines are identified by color code markers, words and geometric symbols. The markers identify each line`s function, content, primary hazard, and the direction of fluid flow.
  • Page 223 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Hose, Tube, and Line Markings Figure 4 20-00-00 PAGE 5 1J23 May 30/07...
  • Page 224 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Presetting Flareless Tube Fittings Figure 5 PAGE 6 20-00-00 May 30/07 1J24...
  • Page 225 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Flareless Tube Assemblies The use of flareless tube fittings eliminates all tube flaring. An operation, referred to as presetting, is necessary prior to installing a new flareless tube assembly. Presetting is performed as follows: Cut tube to correct length.
  • Page 226 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Support Clamps CAUTION: MAKE CERTAIN THAT CLAMPS ARE OF THE CORRECT SIZE. CLAMPS OR SUPPORTING CLIPS SMALLER THAN THE OUTSIDE DIAMETER OF THE HOSE MAY RESTRICT THE FLOW OF FLUID THROUGH THE HOSE.
  • Page 227 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL During normal operation, self-lubricating bearings generally bed in and deposit the overlay material on the mating surface of the bolt, etc., which forms a lubricant film. The bearing rubbing surfaces often acquire at this time, a grey green color, exposing a bronze matrix over about 10% of the bearing surface.
  • Page 228 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 10. Dye Penetrant Inspections NOTE: The following procedure is general in nature. See manufacturer's instructions, included with dye penetrant kit, for specifics. Using a volatile cleaner, thoroughly remove dirt, loose scale, oil and grease from surface to be inspected.
  • Page 229 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 12. Thread Lubrication Lubricate all fittings on external lines, including attachment points at engine and other components, with proper lubricant as specified in Chart 3. When applying thread lubricants, proceed as follows: Thoroughly clean threads before applying lubricant.
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  • Page 231 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL PAINTING Painting Safety WARNING: OVERSPRAY FROM CERTAIN ENAMELS, IF PUT IN WATER, IS FLAMMABLE. STORE ALL OVERSPRAY IN COVERED CONTAINERS AWAY FROM BUILDINGS WHERE SPRAYING OPERATIONS ARE CONDUCTED. WARNING: WASH ALL RAGS AND SPONGES USED TO APPLY ANY PHOSPHORIC ACID CONVERSION COATINGS (ALODINE) BEFORE DISPOSAL.
  • Page 232 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Paint Application WARNING: GROUND AIRCRAFT BEFORE PAINTING SO NO STATIC ELECTRICITY CHARGES BUILD UP AND DISCHARGE. CAUTION: PROTECT WINDSHIELD WHEN MASKING AIRCRAFT. PAINT STRIPPERS, METAL BRIGHTENERS, AND SOLVENTS WILL DAMAGE WINDSHIELD.
  • Page 233 MAINTENANCE MANUAL Paint System Compatibility Before applying new paint, find what type finish was used previously. Refer to the Piper parts catalog for correct paint number and color. Identify paint finishes by applying engine oil to a small surface area. Old nitrocellulose finishes will soften in a few minutes.
  • Page 234 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Sags and Runs - Excess paint causes wet paint film to move by gravity and presents a sagging appearance. Incorrect viscosity, air pressure, and gun handling, or inadequate surface preparation are frequent causes.
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  • Page 236 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 1K12 THRU 2B24 INTENTIONALLY BLANK PAGE 6 20-20-00 Feb 28/09 1K12...

  • Page 237: Environmental Systems

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER ENVIRONMENTAL SYSTEMS...
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  • Page 239 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 21 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 21-40-00 (cont.) May 30/07 21-List of Feb 28/09 Effective Pages May 30/07 May 30/07 May 30/07...

  • Page 240: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 21 LIST OF EFFECTIVE PAGES (continued) CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 21-50-00 (cont.) May 30/07 May 30/07 May 30/07 May 30/07 May 30/07 May 30/07 May 30/07...
  • Page 241 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 21 - ENVIRONMENTAL SYSTEMS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 21-00-00 Description DISTRIBUTION 21-20-00 2C11 Cabin Vent System 2C11 Overhead Vent Blower 2C11 Avionics Cooling Blower...
  • Page 242 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 21 - ENVIRONMENTAL SYSTEMS TABLE OF CONTENTS (continued) SUBJECT SECTION PAGE GRID NO. HEATING (continued) 21-40-00 Fuel Regulator and Shutoff Valve 2D23 100 hour Inspection 2D23 Removal 2D23 Adjustment...
  • Page 243 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 21 - ENVIRONMENTAL SYSTEMS TABLE OF CONTENTS (continued) SUBJECT SECTION PAGE GRID NO. COOLING (continued) 21-50-00 Servicing the System with a Charging Stand Discharging Leak Detection Evacuating the System...
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  • Page 245 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL This chapter deals with the operating, servicing, and inspecting procedures for the heating, air conditioning, and ventilating systems. Description There are six overhead fresh air vents which are supplied by a separate inlet in the dorsal fin. This system can be supplemented by an optional blower.
  • Page 246 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 21-00-00 May 30/07 2C10...
  • Page 247 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL DISTRIBUTION Cabin Vent System Overhead Vent Blower The blower is mounted in the aft section of the fuselage and is connected to the overhead vent system. The blower draws air in from the dorsal fin and forces it through the ducting, whenever desired. (The three position blower switch in the overhead panel controls the two speed blower.)
  • Page 248 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Cabin Heater, Defrosters, and Overhead Vent System Figure 1 PAGE 2 21-20-00 May 30/07 2C12...
  • Page 249 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) With the holes in the cover matching the holes in the motor plate, secure the two parts together with rivets. (4) Apply PR-307 sealant to fill any opening left after the wires are brought through the grommet.
  • Page 250 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 104423 D F.S. 53.60 F.S. 49.50 BLOWER CAP PORT TO FSD 700/740 RADAR DISPLAY TO GTX-327 TRANSPONDER TO SYSTEM 55 AUTO PILOT TO GNS-430 NO 2 TO GNS-530 NO 1...
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  • Page 253 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL HEATING Description A Janitrol Model B3500 (91E88-1 or 91E88-1(EL)) combustion heater is installed as standard equipment. Heated air for the cabin and defroster operation is obtained from the combustion heater located in the tail section of the airplane.
  • Page 254 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 3) TROUBLESHOOTING HEATER Trouble Cause Remedy Heater fails to light. Heater switch or circuit Turn on heater switch or breaker off. close circuit breaker. Low voltage supply.
  • Page 255 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 3) TROUBLESHOOTING HEATER Trouble Cause Remedy Ventilating air blower Heater switch "OFF". Turn heater switch ON. fails to run. Broken or loose wiring Check and repair wiring.
  • Page 256 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 3 of 3) TROUBLESHOOTING HEATER Trouble Cause Remedy Heater fires, but burns Combustion air blower speed Remove and overhaul the unsteadily. (cont.) fluctuates. (Can be caused combustion air blower...
  • Page 257 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Heater System - Operational Test Check all fittings and connections for condition and security of mounting, and all ducts for freedom of obstructions. Disconnect wire (H 10A) from the heater terminal No. 2; this will remove electrical power to the fuel valve and pump so heater will not ignite.
  • Page 258 A heater hour meter is available as an original equipment option; or, as a service kit (No. 764-094) from your Piper Distributor. Use of a heater hour meter permits heater maintenance and overhaul to be based on actual hours of operation.
  • Page 259 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Heater and Combustion Air Blower Assembly Figure 1 21-40-00 PAGE 7 May 30/07...
  • Page 260 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Diagramatic Cutaway of Heater to Show Whirling Flame Action Figure 2 Top View - Duct Switch Figure 3 PAGE 8 21-40-00 May 30/07...
  • Page 261 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Operating Procedure (1) Place the master and heater switches in their ON position and place the air intake lever in the OPEN position. The ventilating air and combustion air blowers will operate and the heater will ignite.
  • Page 262 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Removal of Heater (See Figure 1.) (1) Ascertain that all heater controls are off. (2) Remove the access panel to the aft section of the fuselage. (3) Disconnect the heater outlet hose from the heater air distribution box by releasing the hose attachment clamp.
  • Page 263 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Heater Electrical System Checks Electrical Checks These tests are listed as an aid in isolating open circuited or inoperative components. NOTE: The schematic wiring diagram (Figure 4) shows, in addition to the heater circuitry, the aircraft control circuit.
  • Page 264 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL HEATER (RIGHT LANDING GEAR) FLIGHT HEAT AIR VALVE SW. DEFROST SWITCH VENT BLOWER H15A ANNUNCIATOR HEATER UNIT PANEL DUCT H15B CYCLING SWITCH DEFROST BLOWER H10A FUEL OVER TEMP. VALVE SWITCH...
  • Page 265 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL General Maintenance Instructions in this paragraph pertain to maintenance of the basic heater and components while the heater is installed in the airplane. Instructions for removal of components are included provided the installation permits accessibility.
  • Page 266 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Spark Plug Fixture Wiring Test Setup Figure 5 Figure 6 Spark Plug Gap Adjustment Figure 7 PAGE 14 21-40-00 May 30/07 2D14...
  • Page 267 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Installation: (a) Prior to installing the combustion air blower, inspect all parts of the assembly for loose screws, loose nuts, and poor ground connection on the blower housing. Make sure the blower wheel is tight on the shaft and properly located in the housing.
  • Page 268 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Spark Gap Check and Adjustment: (See Figure 7.) A spark gap of 0.156 to 0.188 inches must be maintained on the P/N 39D18 spark plug. This gap should be checked any time a plug is replaced or at the time of heater overhaul. A spark gap greater than that specified can shorten the life of the ignition assembly.
  • Page 269 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Heater Plug Gap Adjustment Tool Figure 8 21-40-00 PAGE 17 2D17 May 30/07...
  • Page 270 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 18 21-40-00 May 30/07 2D18...
  • Page 271 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) Installation: (Refer to Figure 7.) (a) If a new spark plug is being installed, be sure to adjust the spark gap. Do not bend the electrode on the spark plug.
  • Page 272 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 INSPECTION (IGNITION UNIT) Index No. Nomenclature Inspection Cover Assembly Inspection for security of lead assembly to cover. Ignition cable, grommet, terminal and connector for carbon tracks, cracks or distortion.
  • Page 273 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Testing CAUTION: WHEN TESTING AN IGNITION UNIT, DO NOT USE A SCREWDRIVER AS A SUBSTITUTE FOR A SPARK PLUG AND SPARK PLUG FIXTURE. The ignition unit does not require complete overhaul. The following test will indicate whether or not the unit is operational and whether the vibrator should be replaced before reinstallation in the aircraft.
  • Page 274 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Cycling Switch and Limit (Overheat) Switch (See Figure 13.) (1) Removal: (a) If the limit switch is damaged or defective, disconnect the three electrical leads from the switch terminals. Be sure to mark the leads for proper reassembly. (The switch terminals are identified by numbers "1", "2"...
  • Page 275 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Fuel Regulator and Shutoff Valve (See Figure 10.) The fuel regulator and shutoff valve is located below the floor panel between the main and rear spar on the right side of the cabin. The assembly is enclosed in a special fiberglass box with a removable access panel.
  • Page 276 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Fuel Regulator and Shutoff Valve Figure 10 PAGE 24 21-40-00 May 30/07 2D24...
  • Page 277 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Heater Fuel Pump Maintenance (See Figure 12.) The maintenance required for this type of fuel pump is very limited, consisting of inspection and replacing parts that are worn or broken.
  • Page 278 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Cleaning (a) Wash all parts in cleaning solvent and blow out with air pressure. (b) If plunger does not wash clean or if there are any rough spots, gently clean the surface with crocus cloth.
  • Page 279 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (d) Place the cover gasket and magnet in the bottom cover and assemble the filter and cover assembly. (e) Twist the cover by hand to hold in position on pump housing. Using a 5/8 inch wrench, securely tighten the bottom cover with the bayonet fittings on the pump body and install safety wire.
  • Page 280 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) The combustion air blower to be used with the heater should be used for the test. (4) A 12-volt current supply which may be a dc generator with a rheostat, ammeter, and voltmeter in the line to control and indicate the current draw and voltage output.
  • Page 281 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (13) Connect a jumper across the terminals of the duct switch to make it inoperative and observe action of the cycling switch. The cycling switch should cycle to control the outlet air temperature at approximately 250°F (nominal).
  • Page 282 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Exploded View of Heater Assembly Figure 13 PAGE 30 21-40-00 May 30/07...
  • Page 283 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Exploded View - Combustion Air Blower and Motor Assembly Figure 14 21-40-00 PAGE 31 May 30/07...
  • Page 284 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Suggested Setup of Heater Operation Test Figure 15 PAGE 32 21-40-00 May 30/07...
  • Page 285 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Wiring Connection for Heater Operation Test Figure 16 21-40-00 PAGE 33 May 30/07...
  • Page 286 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 34 21-40-00 May 30/07 2E10...
  • Page 287 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL COOLING WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Fresh Air (Standard) (See 21-20-00.) When the optional air conditioning system is not installed cabin ventilation and cooling is provided solely by fresh air through the overhead vent system.
  • Page 288 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Air Conditioning Installation Figure 1 PAGE 2 21-50-00 May 30/07 2E12...
  • Page 289 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL In the Seneca IV, with the system in operation, refrigerant is pulled into the compressor as a vapor. The vapor is compressed and routed to the condenser where it is cooled and turned into a liquid.
  • Page 290 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 5) TROUBLESHOOTING AIR CONDITIONING SYSTEM Trouble Cause Remedy High discharge pressure. Refrigerant overcharge. Purge excess refrigerant. Air in system. Check for leaks. Bleed charge from system.
  • Page 291 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 5) TROUBLESHOOTING AIR CONDITIONING SYSTEM Trouble Cause Remedy High suction pressure. Capillary bulb clamp loose on Clean contact surfaces of suction line. Suction line shows suction line and cap bulb.
  • Page 292 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 3 of 5) TROUBLESHOOTING AIR CONDITIONING SYSTEM Trouble Cause Remedy System does not cool. (cont.) If mechanical: Loose or broken drive belt. Replace drive belts and tighten to specifications.
  • Page 293 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 4 of 5) TROUBLESHOOTING AIR CONDITIONING SYSTEM Trouble Cause Remedy System cooling inadequate. (cont.) If refrigeration: System refrigerant low. Recharge system until bubbles disappear in receiver dehydrator and gauge readings stabilize to specifications.
  • Page 294 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 5 of 5) TROUBLESHOOTING AIR CONDITIONING SYSTEM Trouble Cause Remedy Excessively noisy system. (cont.) If refrigeration: Excessive system charge. Remove excess refrigerant until high pressure gauge drops within specifications.
  • Page 295 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Servicing Cooling System NOTE: The maximum refrigerant capacity is 2.25 pounds. The total refrigerant capacity required is determined separately for each system and is the amount that will result in bubble-free operation at the sight gauge, as specified in the post charging operational check.
  • Page 296 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 TEMPERATURE VS. PRESSURE Refrigerant R12 Refrigerant HFC134a Evaporator Pressure Evaporator Temperature Evaporator Pressure Evaporator Temperature Gauge Reading psi °F Gauge Reading psi °F. 10.1 11.2 12.3 13.4 14.6 15.8...
  • Page 297 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 21-50-00 PAGE 11 2E21 May 30/07...
  • Page 298 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 2E22 THRU 2E24 INTENTIONALLY BLANK PAGE 12 21-50-00 May 30/07 2E22...
  • Page 299 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Malfunction Detection NOTE: If the cooling system has leaked refrigerant or is discharged, the compressor oil level must be checked. Detection of system malfunction largely depends on the mechanic’s ability to interpret gauge pressure readings into system problems.
  • Page 300 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Special Servicing Procedures The efficiency of this system depends upon the pressure-temperature relationship of pure refrigerant. As long as the system contains only pure refrigerant plus a specified amount of compressor oil (which is mixed with the refrigerant), it is considered to be chemically stable.
  • Page 301 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) System Servicing Precautions: WARNING: DISCHARGE SYSTEMS SLOWLY TO PREVENT THE ESCAPE OF LIQUID REFRIGERANT AND THE LOSS OF THE LUBRICATING OIL. NOTE: The term “Discharge,” as used throughout this section, in no sense implies or suggests discharging refrigerant to atmosphere.
  • Page 302 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 3 RECOMMENDED TORQUE SPECIFICATIONS ALUMINUM TUBING Metal Tube O.D. Thread and Fitting Size Ft./Lb. 7/16 11-13 15-20 21-27 1-1/16 28-33 FLARE CONNECTIONS O-RING CONNECTIONS Tube OD Thread size Ft./Lb.
  • Page 303 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (a) Gain access to service valves by removing rear closeout panel in cabin. (b) Remove protective caps from service valves. (c) Connect high side (red) hose to air conditioner high side service valve. On systems equipped with quick disconnect connections, open coupler valve.
  • Page 304 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (m) To assure complete recovery of refrigerant: Wait 5 minutes. Observe pressure gauges for a rise above zero. If a rise occurs, press the HOLD/CONT key. Repeat as necessary until system maintains pressure for two minutes.
  • Page 305 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) Leak Detection (See Figures 2 and 3) When using a charging stand, a leak may be located as follows: (a) Ensure that aircraft and/or ground power is OFF. (b) Close all valves on the charging stand.
  • Page 306 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Evacuating the System NOTE: Perform a Leak Detection check, above, before evacuating the system. If the system has been operated in a discharged condition or anytime the system has been open to atmospheric pressure, the receiver-dehydrator must be replaced and the system evacuated to remove any trapped air and moisture which has entered it.
  • Page 307 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 12 Open the low pressure control valve and the high pressure control valve on the charging stand. Continue pumping and hold the system pressure below 26 in. Hg. for a minimum of 30 minutes. All the pumping time specified above may be included in the 30 minutes provided that no leaks or blockages are noted, and provided that the system is not opened by removal or disconnection of components.
  • Page 308 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Program the length of evacuation time. Press the VACUUM key on control panel key pad. Display will show unit is in VACUUM mode. See operator’s manual for further detail. Enter the required time in minutes and seconds (30:00 minutes minimum) by pressing appropriate keys and then ENTER on keypad.
  • Page 309 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) Charging the System Note: Always evacuate the system (see above), before charging. (a) Using a Kent Moore J23500 or similar charging stand (See Figures 4 and 5) Open the valve at the base of the charging cylinder and fill the charging cylinder with sufficient refrigerant to charge the system.
  • Page 310 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Enter amount of refrigerant required to charge the system by pressing the appropriate number keys and ENTER on keypad. NOTE: You may enter the amount of refrigerant to be charged when the unit is turned ON.
  • Page 311 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL INLET COMPRESSOR EVAPORATOR COIL OUTLET CONDENSER EXPANSION VALVE LOW SIDE SERVICE PORT RECEIVER - DRYER - SIGHT GLASS HIGH SIDE SERVICE PORT GAUGE 2 RED HIGH PRESSURE CHARGING LINE GAUGE 1...
  • Page 312 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (5) Post Charging Operational Check (see Figures 3, 4, and 6 - for numbers in parentheses see Figure 4; for numbers in brackets see Figure 6) (a) Ensure that the low pressure control valve (3) [1] and the high pressure control valve (10) [2] are closed.
  • Page 313 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Servicing the System with a Manifold Set (1) Test Gauge and Manifold Set The proper testing and diagnosis of the air conditioning system requires that a manifold gauge set (or a charging stand) be attached to the system. This set consists of two gauges mounted to a manifold.
  • Page 314 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Manifold Set Operation Figure 8 PAGE 28 21-50-00 May 30/07 2F16...
  • Page 315 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) Leak Detection (See Figure 9.) (a) Close both the low side and high side valves on manifold hand set. (b) Connect manifold hand set middle port (yellow) hose to a regulated (0-300 psig) gaseous dry nitrogen source or a container of HFC-134a refrigerant.
  • Page 316 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Evacuate the system, see below or Servicing the System, Evacuating, above. (m) Immediately charge the system, see below or Servicing the System, Charging, above. (3) Evacuating the System (See Figure 10.) NOTE: Perform a Leak Detection check, above, before evacuating the system.
  • Page 317 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (h) Close the low side hand valve, stop the vacuum pump and observe the low side gauge. If the gauge rises at a rate faster than 1 in. Hg. in 5 minutes, there is a leak in the system.
  • Page 318 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 6 AMBIENT TEMPERATURE INDICATION AMBIENT GAUGE GAUGE TEMPERATURE INDICATION Low Pressure 10 to 35 psig High Pressure Up thru 75°F 125 psig min to 175 psig max High Pressure Over 75°F...
  • Page 319 (1) Servicing WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) CAUTION: AN IMPORTANT FACTOR IN AIR CONDITIONING SERVICING IS CLEANLINESS.
  • Page 320 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 7 SANDEN COMPRESSOR OIL LEVEL VS. MOUNTING ANGLE Mounting Angle 0° 10° 20° 30° 40° 50° 60° 90° Oil Level 8-10 8-10 9-11 9-11 (in notches) (4) Checking Compressor Oil Level...
  • Page 321 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Checking Compressor Oil Level Figure 11 21-50-00 PAGE 35 2F23 May 30/07...
  • Page 322 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 0.118 " (3mm) INCREMENTS TYPICAL FOR 20 NOTCHES 30˚ 4.115 " Fabricated Dipstick Figure 12 (5) Adjusting Drive Belt Tension (a) Remove left engine cowling. (b) Loosen compressor mounting bolts (4) rotate compressor in mounting brackets slots to obtain a drive belt tension of 45 to 50 lbs.
  • Page 323 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Compressor Installation Figure 13 21-50-00 PAGE 37 May 30/07...
  • Page 324 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Refrigerant Lines And Routing CAUTION: DISCHARGE SYSTEM COMPLETELY BEFORE HOSE COUPLINGS ARE UNCOUPLED. (SEE SERVICING THE SYSTEM, DISCHARGING, ABOVE.) CAUTION: UNITED STATES ENVIRONMENTAL REGULATIONS PROHIBIT THE RELEASE OF REFRIGERANT INTO THE ATMOSPHERE. SPECIAL EQUIPMENT IS REQUIRED WHEN DISCHARGING OR RECHARGING SYSTEM.
  • Page 325 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Components Installation Figure 14 21-50-00 PAGE 39 May 30/07...
  • Page 326 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Condenser (1) Removal Condenser is mounted in a frame assembly in fuselage bottom between stations 156.00 and 191.00. (a) Discharge system per Servicing the System, Discharging, above. (See also Servicing the System, above.)
  • Page 327 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Condenser Air Scoop Installation Figure 15 21-50-00 PAGE 41 May 30/07...
  • Page 328 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Condenser Assembly Rigging Figure 16 PAGE 42 21-50-00 May 30/07...
  • Page 329 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) Condenser Assembly Rigging Instructions (See Figures 15 and 16.) Condenser assembly is actuated by an electric motor through bellcranks, push rods, and limit switches. Condenser door must fit flush with fuselage skin, and with increased force along forward edge.
  • Page 330 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Expansion Valve Figure 17 PAGE 44 21-50-00 May 30/07...
  • Page 331 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Expansion Valve (1) Removal (See Figure 17.) The expansion valve is in evaporator assembly between reciver dehydrator and evaporater inlet. The capillary coil is attached to evaporator outlet line. NOTE: If expansion valve is not serviceable, it must be replaced with a new part.
  • Page 332 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Line mounting bracket with mating holes in mounting panel, insert screws and tighten. Tighten screws in flange and check that the gasket is in place, flange seal must be air tight.
  • Page 333 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 21-50-00 PAGE 47 2G11 May 30/07...
  • Page 334 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 48 21-50-00 May 30/07 2G12...
  • Page 335 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER AUTOFLIGHT 2G13...
  • Page 336 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 2G14...
  • Page 337 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 22 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 22-List of May 30/07 Effective Pages May 30/07 22-Table of Contents May 30/07 May 30/07 22-10-00...

  • Page 338: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 22 - LIST OF EFFECTIVE PAGES 2G16 May 30/07...
  • Page 339 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 22 - AUTOFLIGHT TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. AUTOPILOT 22-10-00 General S-TEC System 55 / 55X S-TEC System 55 (2000) S-TEC System 55X (2001 & up)
  • Page 340 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 2G18 THRU 2G24 INTENTIONALLY BLANK PAGE 2 22 - CONTENTS May 30/07 2G18...
  • Page 341 PUBLICATIONS. General An Autopilot/Flight Director (APFD) system is installed as standard equipment in these airplanes. 1995 - 1999: Seneca IV - S/N’s 3447001 thru 3447029, and Seneca V - S/N’s 3449001 thru 3449151. A King Autopilot/Flight Director (A.P.F.D.), manufactured by then Allied Signal (now Honeywell), was installed in these airplanes.
  • Page 342 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL TRIM C/B 2 AMP TRIM (BLK) MASTER TO A/C GND T2 (3 PIN MOLEX) SWITCH TO A/C BUSS (RED) TRIM MONITOR TRIM MASTER SW TO DIMMER LIGHT RHEOSTAT T1 (3 PIN MOLEX)
  • Page 343 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 104584 H CABLE ASSEMBLY 104082 B CO-PILOT CONTROL WHEEL OPTIONAL CO-PILOT'S (WHT) TRIM CMD (BLK) (BLK) (BLK) CABLE ASSEMBLY (WHT) (WHT) PILOT CONTROL WHEEL TRIM SERVO CONTROL WHEEL FD/AP SWITCH...

  • Page 344: Cable Assembly

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL TRIM C/B 2 AMP TRIM (BLK) MASTER P565 (3 PIN MOLEX) TO A/C GND SWITCH TO DIMMER LIGHT (RED) TRIM MONITOR RHEOSTAT TO A/C TRIM MASTER SW J564 BUSS (WHT)
  • Page 345 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 101817 E CABLE ASSEMBLY P566 OPTIONAL CO-PILOT TRIM CMD CO-PILOT CONTROL WHEEL (WHT) J567 (BLK) (BLK) J5542 (BLK) TRIM RELAY (WHT) (WHT) PILOT CONTROL WHEEL P554 P5542 J5542 CONTROL WHEEL...
  • Page 346 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity System 55 / 55X Autopilot Installation 3449152 and up Figure 1 (Sheet 5 of 5) PAGE 6 22-10-00 May 30/07...
  • Page 347 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Troubleshooting System functionality can be determined using functional checks described in the AFM Supplement and autopilot Pilot’s Operating Handbook. More detailed troubleshooting should be accomplished by authorized S-TEC Dealers, holding the appropriate FAA certification, with required test equipment and service data.

  • Page 348: Press / Release

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Post-Maintenance Operational Checkout Complete the following checkout procedure after any maintenance to the system is performed. NOTE: The Systems 55/55X incorporate a SELF-TEST that requires a 100% pass rate before the autopilot can be engaged.
  • Page 349 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (13) Trim Master (ON / OFF) Switch (14) Manual Electric Trim Test: (a) Trim Master (ON / OFF) switch Move each segment of the Manual Electric Trim Command Switch FWD and AFT.
  • Page 350 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Trim Monitor (See Figure 2.) The trim monitor is mounted to a bracket under the instrument panel on the left side. (1) Removal (a) Disconnect autopilot harness. (b) Remove screws (4) holding trim monitor to mounting bracket and remove trim monitor.
  • Page 351 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 104584 H 104082 B 10. FD PARALLEX POTENTIOMETER 1. ANNUNCIATOR 11. ROLL SERVO 2. PROGRAMMER/COMPUTER 12. YAW AMPLIFIER 3. HORN 13. YAW SERVO 4. ALTITUDE SELECTOR 14. TRIM SERVO 5. TRIM/MASTER ANNUNCIATOR SWITCH 15.
  • Page 352 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL M. Roll Servo (See Figures 2 and 3.) The roll servo is mounted underneath the left rear seat. A bridle cable and clamps attach the servo capstan to the aileron balance cable.
  • Page 353 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) Installation (a) Rig ailerons per Aileron Control Rigging and Adjustment, 27-10-00. (b) Place the control column tee bar in full forward position and secure by use of a suitable tool or by placing weights on the aft side of the stabilator, if stabilator cables have been previously tensioned.
  • Page 354 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rotate the left (pilot's) control wheel in each direction until the bellcranks contact the stops. The sprocket stops on the tee bar shall not be contacted until additional “override" movement (cushion) of the wheel occurs. A "cushion" on 0.030 to 0.040 inches is to be maintained as measured between the sprocket pin and adjustable control wheel stop bolts.
  • Page 355 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Trim Servo (See Figures 2 and 5.) The trim servo is located just left of the aircraft centerline, under the rear seats, just aft of the bulkhead at F.S. 108.17. The left stabilator trim cable wraps around the servo idler pulley and servo capstan.
  • Page 356 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL F.S. 222.5 LEFT LEFT SIDE OUTBOARD TRIM CABLE TRIM SERVO BRACKET F.S. 187.8 C L OF A/C LEFT HAND VIEW LOOKING DOWN ON INSTALLATION RUDDER CABLE BRACKET LEFT SIDE TRIM CABLE...
  • Page 357 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CAUTION: IN STEPS (E) THRU (I), BELOW, USAGE OF LEFT AND RIGHT IS RELATIVE TO THE VIEW OF THE TECHNICIAN IN THE CABIN BAGGAGE AREA LOOKING AFT, EXCEPT WHERE AIRPLANE COMPONENT PARTS ARE SPECIFICALLY NAMED.
  • Page 358 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Pitch Servo (See Figures 2 and 6.) The pitch servo is located under the right rear seat. A bridle cable and clamps attach the servo capstan to the right (upper) stabilator cable.
  • Page 359 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL AFT SPAR BOLT AN3-5A (4 REQ'D) WASHER NAS1149F0363P (8 REQ'D) BRACKET NUT NAS679A-3W (4 REQ'D) BRIDLE CABLE BRACKET BOTTOM A/C SKIN CABLE CLAMP CABLE CLAMP VIEW LOOKING RIGHT FROM C OF A/C WRAP BRIDLE CABLE 610°...
  • Page 360 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Servo Clutch Torque Adjustment (See Figure 7 and Chart 1.) (1) Remove servo per instructions under specific servo, above. (2) Place servo in a holding fixture (i.e. - vice) with capstan up.
  • Page 361 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 104082 B 104584 L SCREW (4 REQ'D) WASHER, AN936-A4 (4 REQ'D) CAPSTAN COVER TORQUE WRENCH TOOL COTTER PIN, CASTLE NUT, AN320-5 MS24665-134 SHIM WASHER, (MIN. 1 REQ'D) CAN BE USED IN ANY COMBINATION TO...
  • Page 362 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 2H22 THRU 2H24 INTENTIONALLY BLANK PAGE 22 22-10-00 May 30/07 2H22...

  • Page 363: Electrical Power

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER ELECTRICAL POWER...
  • Page 364 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK...
  • Page 365 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 24 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 24-List of Feb 28/09 Effective Pages May 30/07 24-Table of Contents Feb 28/09 Feb 28/09 24-00-00...

  • Page 366: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 24 - LIST OF EFFECTIVE PAGES May 30/07...
  • Page 367 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 24 - ELECTRICAL POWER TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 24-00-00 Description and Operation Troubleshooting Contactor Maintenance 2I12 D.C. GENERATION 24-30-00 2I13 Alternator System 2I13 Troubleshooting...
  • Page 368 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 24 - ELECTRICAL POWER TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. ELECTRICAL LOAD DISTRIBUTION 24-50-00 NOTE: For Electrical Schematics / Wiring Diagrams, refer to Chapter 91. PAGE 2...
  • Page 369 MAINTENANCE MANUAL GENERAL WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) This chapter contains instructions for correcting difficulties which may arise in the operation of the electrical system.
  • Page 370 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 4) TROUBLESHOOTING ALTERNATOR Trouble Cause Remedy Zero output indicated on Open field circuit. With battery switch turned ammeter regardless of on, check for battery rpm (refer to alternator voltage from airplane's system test procedure).
  • Page 371 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 4) TROUBLESHOOTING ALTERNATOR Trouble Cause Remedy Zero output indicated on Open field winding Disconnect field terminal of ammeter regardless of in alternator. alternator from field wiring...
  • Page 372 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 3 of 4) TROUBLESHOOTING ALTERNATOR Trouble Cause Remedy Output indicated on Open rectifier. If any of the six rectifiers ammeter does not pressed into the rear bell...
  • Page 373 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 4 of 4) TROUBLESHOOTING ALTERNATOR Trouble Cause Remedy WARNING: TURN MAGNETO SWITCH TO OFF BEFORE TURNING PROPELLER. Field circuit Internal short circuiting of breaker trips. the field can occur at...
  • Page 374 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Contactor Maintenance (See Figure 1.) WARNING: A STARTER CONTACTOR THAT IS DAMAGED AS DESCRIBED BELOW CAN FAIL UNEXPECTEDLY IN THE CLOSED POSITION, CAUSING AN UNCOMMANDED ROTATION OF THE PROPELLER THE NEXT TIME THE MAIN POWER BUS IS ENERGIZED.
  • Page 375 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL D.C. GENERATION WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Alternator System The alternators are mounted on the accessory case on the rear of the engine...
  • Page 376 Precautions WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) CAUTION: DISCONNECT THE BATTERY BEFORE REMOVING OR REPLACING ANY UNIT OR WIRING.
  • Page 377 When repairing the alternator, complete disassembly may not be required. In some cases, it will only be necessary to perform those operations which are required to effect the repair. However, when servicing or inspecting vendor equipment installed in Piper airplanes, it is the user's responsibility to refer to the applicable vendor publication.
  • Page 378 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Battery WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Servicing Battery The battery is a Gill-247 19 amp hour, lead acid, manifold type. On the...
  • Page 379 THE NEW PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 2) TROUBLESHOOTING BATTERY Trouble Cause Remedy Discharged battery. Battery worn out. Replace battery. Standing too long. Remove and recharge battery if left in unused airplane three weeks or more.
  • Page 380 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 2) TROUBLESHOOTING BATTERY Trouble Cause Remedy Battery consumes Charging rate too high Correct charging rate. excessive water. (if in all cells). Cleaning (1) Remove all accumulated contamination from the battery exterior with a stiff bristle brush. (Do not use a metal brush or abrasive materials.) Wipe exterior of battery and interior of manifold,...
  • Page 381 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (g) Thoroughly dry all components and recharge the jar with 0.75 bicarbonate of soda. Place dry jar pad in the jar on top of the soda charge. (h) Screw jar back together and keep it in a vertical position.
  • Page 382 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 8 24-30-00 May 30/07 2I20...
  • Page 383 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Battery Charging - (Gill G-247) CAUTION: NEVER ALLOW LEAD ACID BATTERIES, OR TOOLS USED ON THEM, TO COME IN CONTACT WITH, OR BE NEAR NI-CAD BATTERIES AND NI-CAD BATTERY TOOLS.
  • Page 384 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 HYDROMETER READING AND BATTERY CHARGE PERCENT Hydrometer Reading Percent of Charge 1280 1250 1220 1190 1160 Very little useful capacity 1130 or below discharged CHART 3 SPECIFIC GRAVITY AT FULL CHARGE VS TEMPERATURE...
  • Page 385 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 4 SPECIFIC GRAVITY TEMPERATURE CORRECTION Electrolyte Temperature °C °F Corrections +1.024 +1.020 +1.016 Add to +.012 Reading +.008 Add to +.002 Reading .000 -.004 -.008 -.012 -.016 Subtract -.020 From -.024...
  • Page 386 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Battery Repairs, Storage and Service Tips The internal parts of the battery have been designed to wear at approximately the same rate, making it uneconomical to replace any of the parts with new ones. Replacing the entire battery is simpler and cheaper.
  • Page 387 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Alternator Control Unit — Lamar B-00382-1 Adjustment The only adjustment necessary to maintain the alternator system is the adjustment of the voltage control on the alternator control unit. A voltage of 28.8 Vdc is automatically maintained. All other adjustments are made at the time of manufacture at the factory and need not be reset.
  • Page 388 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Equalizer Test (1) Apply voltmeter at pins #5 and #8 (equalizer and ground). Equalizer voltage should read 5.75V ± 0.1V. NOTE: Equalizer voltage outside 5.65 - 5.85V limits may still be acceptable because of meter calibration differences and temperature.
  • Page 389 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Bench Test of Alternator Control Unit — Lamar #B-00382-1 Figure 2 Overvoltage Test of ACU Figure 3 24-30-00 PAGE 15 May 30/07...
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  • Page 393: External Power

    Starting Through External Power Receptacle On Seneca IV models, the external power receptacle is located on the left side of the nose. On Seneca V models, the external power receptacle is located on the side of the fuselage below the aft cargo door.
  • Page 394 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 24-40-00 May 30/07...

  • Page 395: Electrical Load Distribution

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL ELECTRICAL LOAD DISTRIBUTION CHART 1 ELECTRICAL SYSTEM COMPONENT LOADS (SENECA Duty Cycle Circuit Load Cont. Inter. Equipment Breaker (Amps) Optional Alternator Field (2) 1.57 Anti-Collision (Strobe) Cabin Lights (4) Cigar Lighter Combustion Heater 11.0...
  • Page 396 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 ELECTRICAL SYSTEM COMPONENT LOADS (SENECA Duty Cycle Circuit Load Cont. Inter. Equipment Breaker (Amps) Optional Alternator Field (2) 5 ea. 1.57 ea. Anti-Collision (Strobe) Cabin Lights (4) Combustion Heater 11.0...
  • Page 397 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 24-50-00 PAGE 3 2J11 May 30/07...
  • Page 398 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 4 24-50-00 May 30/07 2J12...

  • Page 399: Equipment / Furnishings

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER EQUIPMENT / FURNISHINGS 2J13...
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  • Page 401 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 25 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 25-List of Feb 28/09 Effective Pages May 30/07 25-Table of Contents Feb 10/08 May 30/07 25-10-00...

  • Page 402: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 25 - LIST OF EFFECTIVE PAGES May 30/07 2J16...
  • Page 403 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 25 - EQUIPMENT / FURNISHINGS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. FLIGHT/PASSENGER COMPARTMENT 25-10-00 2J19 Seats 2J19 Cockpit 2J19 Cabin 2J19 Rigging Instructions - Seat Back Lock and Release...
  • Page 404 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 25 - CONTENTS May 30/07 2J18...
  • Page 405 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL FLIGHT/PASSENGER COMPARTMENT WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Seneca IV has the capacity of seating up to six passengers. The...
  • Page 406 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Seats and Center Console Installation Figure 1 PAGE 2 25-10-00 Feb 10/08 2J20...
  • Page 407 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Seat Back Lock Figure 2 Rigging Instructions - Seat Back Lock and Release (Refer to Figure 2.) (1) Loosen screws and ascertain that clamps are in a relaxed condition. (Push-pull cable is able to move within the clamps.)
  • Page 408 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Lumbar Support (See Figure 3.) (1) Description In the optional interior, the pilot and co-pilot seats incorporate a Lumbar support feature. The installation consists of an inflatable bladder attached to the seat back filler and an inflation bulb located under and on the inboard side of each pilot and co-pilot seat.
  • Page 409 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL BLADDER INFLATION BLADDER AIR INLET AND VENT BLADDER AND PAD BLADDER TUBE SEAT BACK FILLER BLADDER INFLATION AND DEFLATION CONTROLS Lumbar Seat Bladder Installation Figure 3 25-10-00 PAGE 5 2J23...
  • Page 410 S/N’s 3449165 and up. Earlier airplanes employ a traditional lap belt with a separate, detachable, shoulder harness. Inspection. In Seneca IV’s and Seneca V S/N’s 3449001 thru 3449164: (a) Shoulder Harness Inspect ends and attachment points for condition and security.
  • Page 411 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Entertainment/Executive Console Effectivity Seneca V Figure 3 25-10-00 PAGE 7 Feb 10/08...
  • Page 412 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Entertainment/Executive Console (Seneca V only) (See Figure 3.) The Entertainment/Executive Console is available on Seneca V models in place of the right hand aft facing seat. Some of the features of the console are: a horizontally sliding, pull out table, which when in the extended position, reveals a storage compartment;...
  • Page 413 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Carpets The carpets are individually fastened to the floor with Velcro fasteners and adhesive (Hysol EA9309 NA). 25-10-00 PAGE 9 Feb 10/08...
  • Page 414 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 10 25-10-00 May 30/07...
  • Page 415 MAINTENANCE MANUAL EMERGENCY WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) This section contains information necessary to perform operational checks of the Emergency Locator Transmitter (ELT), with and without a pilot’s remote switch.
  • Page 416 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 2) TROUBLESHOOTING ME406 ELT Trouble Cause Remedy 3 Flash Error Bad load detect. Check that the RF cable is after performing Self Test. Detects open or short condition connected and in good on the antenna output or cable.
  • Page 417 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 2) TROUBLESHOOTING ME406 ELT Trouble Cause Remedy Remote Switch LED Wiring error or frayed wires Verify wiring. always ON (steady). shorting out pins on back of Remote Switch.
  • Page 418 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Artex ME406 ELT Installation 3449359 and up Figure 1 PAGE 4 25-60-00 May 30/07...
  • Page 419 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 100 Hour Inspection Each 100 hours time-in-service or annually, whichever comes first, inspect the ELT installation as follows: NOTE: The following inspection satisfies the requirements of FAR 91.207. (1) In the cabin, remove the rear closeout panel.
  • Page 420 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (7) G-switch Check A basic test of G-switch operation can be performed as follows: CAUTION: EVEN WITHOUT AN ANTENNA CONNECTED, THE SIGNAL CAN BE RECEIVED BY A SATELLITE. AS WITH ALL BEACON-TESTING, THIS TEST...
  • Page 421 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Removal (1) In the cabin, remove the rear closeout panel. (2) Disconnect and remove positive cable from battery. (3) At right side of empennage, remove four (4) screws and remove ELT access panel.
  • Page 422 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (9) Perform Installed Transmitter Test (Self Test) per Testing, below. (10) Enter pertinent battery replacement information in the aircraft log book and fill out any other documentation required by local authority.
  • Page 423 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (e) If the panel LED and buzzer present more than one (1) pulse when switched to “ARM”, determine the problem from the list below. 1 Flash - Indicates that the system is operational and that no error conditions were found.
  • Page 424 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Digital Message Verification The ARTEX 406 MHz ELT transmits a 406 MHz message upon reset, which is encoded such that it will be ignored by the SAR satellite system. The 15-digit number contained in this transmission is used to register the ELT with the appropriate 406 MHz ELT registration authority.
  • Page 425 J203 J501 12 11 10 9 D-SUB CONNECTOR FOR ELT UNIT MOLEX CONNECTOR FOR COCKPIT SWITCH ASSEMBLY J501 J203 REMOTE LIGHT SWITCH WHT/BLU WHT/BLU RESET 1 WHT/ORG WHT/ORG RESET 2 EXTERNAL ON WHT/GRN WHT/GRN SP301 GROUND WHT/RED WHT/RED +14V G-SWITCH LOOP LS201 +28V G-SWITCH LOOP...
  • Page 426 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Artex ELT 110-4 Emergency Locator Transmitter (ELT) Description The Artex ELT 110-4 transmits on 121.5 mHz and 243.0 mHz, and is designed to meet or exceed the requirements of TSO C91a and FAR Part 91. Electrical power for the ELT transmissions is totally supplied by its own self-contained battery.
  • Page 427 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Battery (See Figure 3.) (1) Removal (a) In cabin, remove rear closeout panel. (b) Disconnect and remove positive cable from battery. (c) At right side of empennage, remove four (4) screws and remove ELT access panel.
  • Page 428 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) If the operational tests must be made at a time not included within the first five minutes after the hour, the test should be coordinated with the closest FAA Tower or Flight Service Station.
  • Page 429 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Narco 910 (See Figures 5 and 6.) CAUTION: ALTHOUGH THE ELT IS INDEPENDENT OF THE AIRPLANE'S ELECTRICAL SYSTEM, REMOVE POSITIVE CABLE FROM AIRPLANE'S BATTERY ANYTIME WORK IS TO BE DONE ON ANY ELECTRICAL OR ELECTRONIC EQUIPMENT.
  • Page 430 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Test transmission should be received by aircraft communications receiver and/or FAA facility. During cold weather, there may be a slight delay before transmission occurs. (g) A properly functioning transmitter emits a characteristic downward swept tone.
  • Page 431 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL J501 P203 TERMINAL TERMINAL +28 VDC ELT SW PWR 1/2 A ELT 910 REMOTE SWITCH Narco 910 Wiring Schematic Effectivity Figure 5 Seneca IV Narco 910 Battery Pack Effectivity Figure 6...
  • Page 432 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 2K22 THRU 3B24 INTENTIONALLY BLANK PAGE 18 25-60-00 Feb 28/09 2K22...

  • Page 433: Fire Protection

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER FIRE PROTECTION...
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  • Page 435 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 26 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 26-List of Feb 10/08 Effective Pages May 30/07 26-Table of Contents May 30/07 May 30/07 26-20-00...

  • Page 436: List Of Effective Pages

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  • Page 437 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 26 - FIRE PROTECTION TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. EXTINGUISHING 26-20-00 Portable Fire Extinguisher Description Inspection 26 - CONTENTS PAGE 1 May 30/07...
  • Page 438 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 26 - CONTENTS May 30/07...
  • Page 439 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL EXTINGUISHING WARNING: AFTER DISCHARGE OF EXTINGUISHER AVOID EXPOSURE TO SMOKE, VAPORS AND OTHER BY-PRODUCTS OF FIRE. DO NOT INCINERATE EXTINGUISHER. CAUTION: EXTINGUISHER IS A PRESSURE VESSEL. PROTECT FROM CORROSIVE CONDITIONS. IF THERE IS ANY CORROSION OR DAMAGE, EXTINGUISHER SHOULD BE CAREFULLY EMPTIED AND DISCARDED.
  • Page 440 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Seneca V Fire Extinguisher Locator with Entertainment Console Figure 1 PAGE 2 26-20-00 May 30/07...
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  • Page 443: Flight Controls

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER FLIGHT CONTROLS 3C11...
  • Page 444 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 3C12...
  • Page 445 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 27 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 27-20-00 (cont.) Feb 10/08 27-List of Feb 28/09 Effective Pages May 30/07 Feb 28/09 May 30/07...
  • Page 446 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 27 - LIST OF EFFECTIVE PAGES 3C14 May 30/07...
  • Page 447 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 27 - FLIGHT CONTROLS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 27-00-00 3C19 Description and Operation 3C19 Standard Practices and Procedures 3C19 Control Cable Inspection 3C21 Cable Damage...
  • Page 448 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 27 - FLIGHT CONTROLS TABLE OF CONTENTS (continued) SUBJECT SECTION PAGE GRID NO. STABILATOR CONTROLS 27-30-00 3E15 Troubleshooting 3E15 Stabilator Control Cables 3E16 Removal 3E16 Installation 3E18 Rigging and Adjustment...
  • Page 449 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 27 - CONTENTS PAGE 3 3C17 May 30/07...
  • Page 450 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 4 27 - CONTENTS May 30/07 3C18...
  • Page 451 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL Description and Operation The airplane is controlled in flight by the use of three primary control surfaces, consisting of ailerons, stabilator, and rudder. Operation of these controls is through the movement of the control column-tee bar assembly and rudder pedals.
  • Page 452 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 CABLE TENSION vs. AMBIENT TEMPERATURE -10 -8 Subtract Rigging Load Correction, Pounds PAGE 2 27-00-00 May 30/07 3C20...
  • Page 453 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Control Cable Inspection Aircraft control cable systems are subject to a variety of environmental conditions and forms of deterioration that, with time, may be easy to recognize as wire/strand breakage or the not-so-readily visible types of wear, corrosion, and/or distortion.
  • Page 454 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL External Wear Patterns Wear will normally extend along cable equal to the distance cable moves at that location. Wear may occur on one side of the cable only or on its entire circumference. Replace flexible and non-flexible cables when individual wires in each strand appear to blend together (outer wires worn 40-50 percent) as depicted in Figure 2.
  • Page 455 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Internal Cable Wear As wear is taking place on the exterior surface of a cable, the same condition is taking place internally, particularly in the sections of the cable which pass over pulleys and quadrants. This condition, shown in Figure 3, is not easily detected unless the strands of the cable are separated.
  • Page 456 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Cable Maintenance CAUTION: TO AVOID REMOVAL OF CORROSION-PREVENTATIVE COMPOUNDS AND CABLE INTERNAL LUBRICANT, DO NOT USE VAPOR DEGREASING, STEAM CLEANING, METHYLETHYLKETONE (MEK) OR OTHER SOLVENTS. CAUTION: DO NOT OIL CONTROL CABLES.
  • Page 457 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Pulley Wear Patterns Figure 4 27-00-00 PAGE 7 May 30/07...
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  • Page 461: Aileron Controls

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL AILERON CONTROLS Troubleshooting Chart 1 lists troubles peculiar to aileron flight controls along with their probable causes and suggested remedies. When troubleshooting the aileron flight controls, additional reference may be obtained from Chapter 57 on control surface balancing, if required.
  • Page 462 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 2) TROUBLESHOOTING AILERON CONTROL SYSTEM Trouble Cause Remedy Incorrect aileron travel. Aileron control rods not Adjust control rods. adjusted properly. Aileron bellcrank stops Adjust bellcrank stops.
  • Page 463 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Control Column Installation Figure 1 27-10-00 PAGE 3 May 30/07...
  • Page 464 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Disconnect the necessary control cables, such as the propeller pitch control, mixture control, etc., that will allow the tee bar assembly to be removed. (k) Remove the tee bar assembly by removing the attachment bolts with washers and nuts which are through each side of the floor tunnel.
  • Page 465 (2) Degrease control wheel attachment screw, the spacer, and the nutplate (inside the tube) using acetone or naptha. Allow to dry. (3) Prime inside of control wheel with Loctite 7649 (Piper P/N 279-073). Allow to dry. (4) Install control wheel onto tube using Loctite 271 (Piper P/N 279-128). Take care to ensure screw hole in control wheel aligns with screw hole in tube.
  • Page 466 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Control Wheel Installation 3449042 & UP Figure 2 PAGE 6 27-10-00 May 30/07 3D10...
  • Page 467 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Control Column Rigging Figure 3 27-10-00 PAGE 7 3D11 May 30/07...
  • Page 468 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL SMALL END OF TAPERED SHANK SHALL NOT EXTEND MORE THAN 0.030 INSIDE THE O.D. OR 0.062 OUTSIDE TAPER PIN (480-730) THE O.D. OF THE SPOCKET HUB. WASHER (407-564 [AN960-10]) OR (494-093 [AN975-3])
  • Page 469 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (e) Remove the cotter pins used as cable guards at the pulley in the forward area of the floor opening aft of the main spar. Disconnect the cable from the control chain at the control column tee bar assembly by removing the cotter pin, nut, bolt, and bushing that connect the two together.
  • Page 470 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Aileron Controls Figure 5 (Sheet 1 of 2) PAGE 10 27-10-00 May 30/07 3D14...
  • Page 471 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Aileron Controls Figure 5 (Sheet 2 of 2) (2) The primary control cable in either wing may be installed by the following procedure: (a) Draw the control cable into the wing.
  • Page 472 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Aileron Bellcrank Assembly Removal (See Figure 5.) (1) Remove the floor panel located directly aft of the main spar by removing the center seats, seat belt attachments, and the screws securing the floor panel. Lift the panel and remove from the airplane.
  • Page 473 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Adjust the turnbuckles on the primary and balance cables (located under the floor behind the spar carry through) to the tension specified in Figure 6. Make sure the bellcranks remain in their neutral positions.
  • Page 474 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Aileron Rigging Figure 6 Aileron Bellcrank Rigging Figure 7 PAGE 14 27-10-00 May 30/07 3D18...
  • Page 475 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Aileron Bellcrank Rigging Tool Figure 8 Aileron and Flap Rigging Tool Figure 9 27-10-00 PAGE 15 3D19 May 30/07...
  • Page 476 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 16 27-10-00 May 30/07 3D20...
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  • Page 478 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 18 27-10-00 May 30/07 3D22...

  • Page 479: Rudder Controls

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL RUDDER CONTROLS Troubleshooting Charts 1 lists troubles peculiar to rudder control system along with their probable causes and suggested remedies. When troubleshooting the rudder control system, additional reference may be obtained from Chapter 55 on control surface balancing, if required.
  • Page 480 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rudder Pedal Assembly Removal (See Figure 1.) (1) Remove the access panel to the aft section of the fuselage. (2) Relieve rudder and stabilator cable tension by loosening one of the rudder and stabilator cable turnbuckles in the aft section of the fuselage.
  • Page 481 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rudder Pedals Installation Figure 1 27-20-00 PAGE 3 May 30/07...
  • Page 482 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (9) Connect the rudder trim to the arm of the torque tube and secure with bolt, washer, nut and cotter pin. A thin washer is installed under the nut which is tightened only finger tight.
  • Page 483 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Installation (See Figure 1.) (1) The forward rudder control cables may be installed by the following procedure: (a) Draw the control cable through the floor tunnel. (b) Connect the end of the cable to the arm on the rudder pedal torque tube (Figure 2) by installing bolt, washer, nut and cotter pin, allowing the cable end to rotate freely.
  • Page 484 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rudder Controls Installation Figure 2 (Sheet 1 of 2) PAGE 6 27-20-00 Feb 10/08...
  • Page 485 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rudder Controls Installation Figure 2 (Sheet 2 of 2) 27-20-00 PAGE 7 Feb 10/08...
  • Page 486 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rigging and Adjustment (See Figures 3, 4, and 27-30-00, Figure 2.) (PIR-PPS50009-4, Rev. G/PPS50009-5, Rev. L.) Measurements for determining rudder travel are initiated from the neutral position (i. e. when the rudder is streamlined with the vertical stabilizer).
  • Page 487 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rigging Rudder and Controls Figure 3 27-20-00 PAGE 9 May 30/07...
  • Page 488 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rudder Trim Controls (Forward) Removal (See Figure 1.) (1) To remove the trim control wheel assembly and/or trim control cables, first remove the panel to the aft section of the fuselage.
  • Page 489 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (e) Align the trim control cables and position the control wheel assembly between its mounting brackets. Ascertain that the trim indicator wire is positioned in the spiraled slot of the wheel with no binding on the end. Install the retainer bolt from the upper side, along with the washer and secure with washer and nut from below.
  • Page 490 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Installation (See Figure 1.) (1) Insert the complete trim screw and barrel assembly into the fin. Route the trim cable ends around the pulleys at station 279.032. (2) Insert the trim screw and barrel assembly into the mounting bracket. Place the washer on the forward end of the barrel and install the support assembly in the mounting bracket.
  • Page 491 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) Check that each tab travel is 25 ± 1 degrees (Seneca IV) or 26 ± 1 degrees (Seneca V). Adjust the actuating rod as necessary to obtain correct travel.
  • Page 492 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rudder Rigging Tool Figure 4 PAGE 14 27-20-00 May 30/07 3E12...
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  • Page 495: Stabilator Controls

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL STABILATOR CONTROLS Troubleshooting Charts 1 and 2 lists troubles peculiar to stabilator control system along with their probable causes and suggested remedies. When troubleshooting the stabilator control system, additional reference may be obtained on control surface balancing from Chapter 55.
  • Page 496 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 TROUBLESHOOTING STABILATOR MANUAL TRIM CONTROL SYSTEM Trouble Cause Remedy Lost motion between Cable tension too low. Adjust cable tension. trim control wheel and trim tab. Cables not in place on Install cables properly.
  • Page 497 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rudder and Stabilator Adjustments Figure 1 Method of Securing Trim Cables Figure 2 27-30-00 PAGE 3 3E17 May 30/07...
  • Page 498 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (c) Remove the floor and located directly aft of the main spar by removing the center seats, seat belt attachments, and the screws securing the panel. Lift the panel and remove from the airplane.
  • Page 499 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Stabilator Controls Installation Figure 3 (Sheet 1 of 2) 27-30-00 PAGE 5 3E19 May 30/07...
  • Page 500 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Stabilator Controls Installation Figure 3 (Sheet 2 of 2) PAGE 6 27-30-00 May 30/07 3E20...
  • Page 501 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) Either aft stabilator control cable may be installed by the following procedure: (a) Route the cable around its pulley located either over or under the balance arm of the stabilator.
  • Page 502 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rigging and Adjustment (See Figures 3 and 4.) (PIR-PPS50009-4, Rev. G/PPS50009-5, Rev. L.) The stabilator control system is designed to have the stabilator in neutral when the stabilator chord line is parallel to that of the front seat tracks. Travels as specified in Figure 4, are measured from the neutral point.
  • Page 503 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) With the stabilator in neutral and the feel springs still detached proceed as follows to adjust the stabilator tab: (a) Position the tab control in its neutral position. (b) As necessary adjust the tab push rod to streamline the tab with the stabilator. This is the neutral position of the tab.
  • Page 504 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (g) Remove the cable rub blocks located in the floor opening on the aft side of the main spar by removing the block attachment screws. (h) Remove the carpet and the heater duct over the aft floor tunnel.
  • Page 505 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (k) Install the carpet over the floor tunnel. Install the cover over the trim control wheel and secure with screws and special washers. (m) Install the seat belts removed from the top of the floor tunnel and secure with bolt, washer and nut.
  • Page 506 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (7) Route the cable around the pulleys at station 292.34 and forward to the turnbuckles in the fuselage. (8) Ascertain that the cables are in the pulley grooves; then install the guard pins at the pulleys.
  • Page 507 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 27-30-00 PAGE 13 Feb 10/08...
  • Page 508 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Stall Warning System The stall warning system for this aircraft is designed to detect stall conditions through two modes of flight operation. These conditions involve flight of the aircraft with flaps at 0° and 24°, or 25° and 40°. To accomplish this, the system utilizes two lift detectors, two micro switches, a horn, and a 5 amp circuit breaker.
  • Page 509 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Stall Warning Flap Microswitch Adjustment Figure 5 Flight Test Procedure (PIR-FTP2001-12, Rev. F) NOTE: Required whenever a “replacement” wing is installed. Fly airplane, and at a rate of 1 KT/SEC maximum, record the following warning and stall speeds:...
  • Page 510 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Stabilator Rigging Tool Figure 6 PAGE 16 27-30-00 Feb 10/08...
  • Page 511 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 27-30-00 PAGE 17 May 30/07...
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  • Page 513: Flap Controls

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL FLAP CONTROLS Troubleshooting Chart 1 lists troubles peculiar to flap control system along with their probable causes and suggested remedies. When troubleshooting the flap control system, additional reference may be obtained from Chapter 57 on control surface balancing, if required.
  • Page 514 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Flap Control System Installation Figure 1 PAGE 2 27-50-00 May 30/07 3F10...
  • Page 515 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) The flap control cable may be removed by the following procedure: (a) If the center seats and floor panel have not been removed, remove the seats and the screws securing the floor panel.
  • Page 516 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Install tube support bearing blocks . Secure by installing block attachment bolts. (g) Connect jack screw actuator to torque tube bellcrank and secure with nut, washers and bolt. (h) Connect cable ends to torque tube pulley assembly and secure with cotter pins.
  • Page 517 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Rigging of Electric Flap Controls Figure 2 Rigging of Flap Cam-Cable Assembly Figure 3 27-50-00 PAGE 5 3F13 May 30/07...
  • Page 518 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (10) Move the selector lever to the full UP position and verify that clearance between the actuator pushrod and torque tube is 0.07 inches minimum, 0.19 inches maximum. (See Figure 2.) (11) Adjust the left and the right stop screws so that contact is just made with the stop.
  • Page 519 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Stop Screws Adjustment Figure 4 Flap Potentiometer Adjustment Figure 5 27-50-00 PAGE 7 3F15 Feb 28/09...
  • Page 520 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Torque Tube/Push Rod Distortion Inspection If flaps have been extended at or above V , inspect the flap torque tube arms and pushrods for evidence of distortion. If the paint is cracked or peeling anywhere along the torque tube arm or pushrod, torsional movement has occurred.
  • Page 521 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 27-50-00 PAGE 9 3F17 May 30/07...
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  • Page 523 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER FUEL 3F19...
  • Page 524 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 3F20...
  • Page 525 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 28 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 28-20-00 May 30/07 28-List of May 30/07 Effective Pages May 30/07 May 30/07 May 30/07 28-Table of Contents...

  • Page 526: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 28 - LIST OF EFFECTIVE PAGES May 30/07 3F22...
  • Page 527 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 28 - FUEL TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 28-00-00 Description and Operation Troubleshooting Inspection of Fuel System STORAGE 28-10-00 Inspection and Repair of Fuel Tanks...
  • Page 528 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 28 - FUEL TABLE OF CONTENTS (continued) SUBJECT SECTION PAGE GRID NO. DISTRIBUTION 28-20-00 Fuel Vent and Vapor Return Systems Vapor Return System (Seneca IV only) Vapor Return System...
  • Page 529 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL This chapter provides information for the maintenance of repairable components of the fuel system. A troubleshooting section is included to assist in isolating and correcting troubles which may occur.
  • Page 530 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CAUTION: (SENECA IV MODELS) EXCESSIVE FUEL PRESSURE AND VERY RICH FUEL/AIR MIXTURES WILL OCCUR IF THE HI POSITION IS ENERGIZED WHEN THE ENGINE FUEL INJECTION SYSTEM IS FUNCTIONING NORMALLY. Seneca IV...
  • Page 531 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 TROUBLESHOOTING FUEL SYSTEM Trouble Cause Remedy Failure of fuel to flow. Fuel line blocked. Flush fuel system. Fuel vent cap blocked. Check and clean vent hole in cap.
  • Page 532 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Fuel System Schematic Seneca IV Figure 1 (Sheet 1 of 2) PAGE 4 28-00-00 May 30/07...
  • Page 533 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Fuel System Schematic Effectivity Figure 1 (Sheet 2 of 2) Seneca V 28-00-00 PAGE 5 May 30/07...
  • Page 534 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 6 28-00-00 May 30/07...
  • Page 535 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 28-00-00 PAGE 7 May 30/07...
  • Page 536 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 8 28-00-00 May 30/07...
  • Page 537 INSPECTION. WARNING: IF DRAIN VALVES ARE REMOVED TO DRAIN TANKS, APPLY PARKER HANNIFIN THREAD LUBE, PIPER P/N 913-224, TO MALE PIPE THREADS BEFORE INSTALLING. DO NOT ALLOW LUBRICANT TO ENTER FUEL SYSTEM. Completely drain fuel tanks. (See Draining Fuel Systems, 12-10-00) Inspect each tank for signs of leaks as indicated by telltale stains.
  • Page 538 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Fuel Cell Installation Figure 1 PAGE 2 28-10-00 May 30/07 3G10...
  • Page 539 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Installation of Outboard Fuel Tank (See Figure 1, 28-00-00 and Figure 1, 28-10-00.) (1) Position fuel tank in its recess in the wing. (2) Connect vent line on outboard side, and fuel sender wires.
  • Page 540 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Maintenance of Fuel Cells WARNING: OBSERVE ALL FUEL SYSTEM FIRE HAZARD PRECAUTIONS THROUGHOUT ALL REMOVAL AND INSPECTION PROCEDURES. USE VAPOR-PROOF LIGHT FOR INSPECTION. Cleaning and Inspection of Fuel Cells (1) Fuel cells may be cleaned by the following procedure: (a) New Cells: It should not be necessary to clean new cells upon removing them from their containers, if they are installed in the airframe cavities promptly.
  • Page 541 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (c) Stack boxed cells to allow access to oldest cells first. Do not allow stacks to crush bottom boxes. Leave cells in boxes until used. (d) Storage area must be dry, 70°F, and free of exposure to sunlight, dirt and damage.
  • Page 542 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 FUEL CELL REPAIR MATERIALS AND EQUIPMENT Repair Kit, Goodyear Drawing No. 2F1-3-37813 80C27 Repair Cement Pint cans, 320 gms in each 80C28 Cross-Linker 4 oz. bottles, 81 cc in each...
  • Page 543 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (11) All heat cured patches are ready for use when cool. (12) Fitting repairs are confined to loose flange edges, seal surfaces rework and coat stock. NOTE: Any damage not covered by the above should be returned to The Engineered Fabrics Corporation, Rockmart, Georgia, for repair.
  • Page 544 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CAUTION: SUCCESS OF APPLYING BOTH AN OUTSIDE AND INSIDE REPAIR PATCH SIMULTANEOUSLY IS DOUBTFUL AND NOT RECOMMENDED. (13) Inside patch is applied same as above procedure except for size of repair patch (see limitations) after outside patch has been cured.
  • Page 545 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (8) After the test, remove all plates and test equipment. Allow the cell to air out. (9) In conducting either test outlined above, the cell need not be confined by a cage or jig, providing the 1/4 psi pressure is not exceeded.
  • Page 546 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (5) Connect shop air to test fixture. CAUTION: DO NOT EXCEED THE 1.5 PSI LIMIT OR FUEL CELL DAMAGE MAY OCCUR. (6) Select Test Fixture “Valve 2” and “Valve 3” to “ON” position, and using “Valve 1”, slowly pressurize to 1.0 psi minimum to 1.5 psi maximum.
  • Page 547 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Test Fixture Schematic Figure 2 28-10-00 PAGE 11 3G19 May 30/07...
  • Page 548 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (8) Open both test cap shut-off valves, slowly open “Valve 4” and monitor pressure on main pressure gauge. If pressure exceeds 1.5 psi, immediately close “Valve 1” and open flow meter valves.
  • Page 549 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Off Flow Test (1) Perform steps (1) thru (9) under Fuel System Leak Test, above. (2) Move valves on the fuel filler test caps to “OFF” positions and open “Valves 2 and 3.”...
  • Page 550 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Flush Fuel Cap Maintenance (See Figure 3.) NOTE: These instructions do not apply to new style fuel caps (P/N 654-556 Locking, and 654-557 Non- Locking) installed in 2006 and later.
  • Page 551 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL (3) Coat the threads of the bolts with Tite-Seal Gasket and Joint Sealing Compound (medium weight). (4) Install bolts. Locking Fuel Cap (Refer to Figure 4.) NOTE: These instructions do not apply to “new style”...
  • Page 552 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Effectivity Old Style Locking Fuel Cap Circa 2006 and earlier Figure 4 PAGE 16 28-10-00 May 30/07 3G24...
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  • Page 555 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL DISTRIBUTION Fuel Vent and Vapor Return Systems Vapor Return System (Seneca IV only) Both fuel systems utilize vapor return and vent systems. Although it is not difficult to maintain the systems, it is recommended that they be inspected routinely with the following information in mind.
  • Page 556 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Fuel Vent System Figure 1 PAGE 2 28-20-00 May 30/07...
  • Page 557 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Fuel Selector Valve Figure 2 Fuel Selector Valve CAUTION: NO FIELD DISASSEMBLY OR REPAIR OF FUEL SELECTOR VALVES IS AUTHORIZED.
  • Page 558 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Installation (1) Position the selector valve in the wing with the lever facing down and the center port facing forward. Secure to the mounting bracket with four screws and nuts.
  • Page 559 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Fuel Pump, Slide Resistor and Filter Installation Effectivity Figure 3 Seneca IV 28-20-00 PAGE 5 May 30/07...
  • Page 560 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL (h) Adjust the slider on the variable resistor to obtain a pump pressure of 8 to 10 psi. Readjust the power supply and slider to ensure a pump pressure of 8 to 10 psi, at the power supply voltage noted in Step (e), then secure the slider in position on the resistor.
  • Page 561 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Fuel Filter Assembly Figure 4 28-20-00 PAGE 7 May 30/07...
  • Page 562 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Disassembly of Fuel Filter (Refer to Figures 3 and 4.) (1) Cut safety wire and remove cap nut from the bottom of the filter bowl.
  • Page 563 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL Installation of Fuel Filter (1) Position the filter assembly in the wing. Ascertain that it is positioned properly and secure to its mounting bracket with the two bolts.
  • Page 564 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 10 28-20-00 May 30/07 3H12...
  • Page 565 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL INDICATING NOTE: The fuel quantity calibration procedure for the Seneca V fuel quantity gauge is found in this section. Additional information on the fuel quantity gauge installed in Seneca V models is found in 77-40-00.
  • Page 566 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Seneca IV Fuel Quantity Indicators Figure 1 CHART 1 FUEL QUANTITY SENDER GAUGE TOLERANCES (SENECA Additional Total Fuel Remaining Resistance Fuel Drained Within Tanks Gauge Reading Both Senders (U. S. Gallons) (U.S.
  • Page 567 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Seneca V DDMP Fuel Quantity Calibration CAUTION: REPLACEMENT OF THE FUEL QUANTITY INDICATOR REQUIRES THAT THE NEW INDICATOR BE CALIBRATED PER THE PROCEDURE BELOW. NOTE: Calibration is not required if the existing instrument is simply removed and reinstalled.
  • Page 568 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (k) Add 3.0 gallons of fuel (unusable) to left wing tank. Select "calibration" from menu in DDMP. Use up/down buttons to move cursor to selection noted above and enter by pressing the "SEL"...
  • Page 570 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL AVIDYNE Fuel Quantity Calibration (From Engine Setup Page) CAUTION REPLACEMENT OF ANY OF THE FUEL QUANTITY SENDERS OR REPLACEMENT OF THE MULTI-FUNCTION DISPLAY REQUIRES RECALIBRATION. (1) Prepare the aircraft for testing (a) Level the aircraft ±...
  • Page 571 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 28-40-00 PAGE 7 3H19 May 30/07...
  • Page 572 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Full Gauge Range Check Defuel both fuel tanks. Add 3 gallons of fuel to each tank (unusable). Verify that fuel gauges indicate "O" or "E". See Figure 3 for analog needle display limits at empty. Add 10 gallons of fuel to each tank and again observe analog and digital gauge readings.

  • Page 573: Fuel Calibration

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 FUEL CALIBRATION (SENECA FUEL CALIBRATION TANK CAPACITY (EITHER SIDE) RESISTANCE GAUGE READINGS TOLERANCE (GALS) (GALLONS) (OHMS) (± 1) ANALOG DIGITAL (ON GAUGE READING) 0.0 (E) ± 0 (3) Gal. Unusable ±...
  • Page 574 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 10 28-40-00 May 30/07 3H22...
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  • Page 577: Hydraulic Power

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER HYDRAULIC POWER...
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  • Page 579 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 29 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 29-List of Feb 28/09 Effective Pages May 30/07 29-Table of Contents May 30/07 May 30/07 29-00-00...

  • Page 580: List Of Effective Pages

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  • Page 581 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 29 - HYDRAULIC POWER TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 29-00-00 Description Troubleshooting MAIN 29-10-00 3I17 Hydraulic Pump 3I17 Removal 3I17 Installation 3I17 Field Service 3I20...
  • Page 582 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 29 - CONTENTS May 30/07...
  • Page 583 MAINTENANCE MANUAL GENERAL WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) CAUTION: PRIOR TO STARTING ANY INVESTIGATION OF THE HYDRAULIC SYSTEM, PLACE THE AIRPLANE ON JACKS (SEE JACKING, 07-10-00.)
  • Page 584 NOTE: Field service of the Oildyne hydraulic pump is limited to motor replacement and removal, cleaning, and inspecting the hydraulic fluid reservoir. Should pump malfunction, replace pump, or return pump to Piper via your local Piper distributor for servicing or repairs. PAGE 2...
  • Page 585 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Hydraulic System Schematic Diagram (Oildyne) Figure 1 29-00-00 PAGE 3 May 30/07...
  • Page 586 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Hydraulic System Installation Figure 2 PAGE 4 29-00-00 May 30/07 3I10...
  • Page 587 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 (Sheet 1 of 4) TROUBLESHOOTING HYDRAULIC SYSTEM Trouble Cause Remedy Landing gear retraction Landing gear actuator circuit Reset circuit breaker and system fails to operate. breaker open. determine cause for open circuit breaker.
  • Page 588 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 (Sheet 1 of 4) TROUBLESHOOTING HYDRAULIC SYSTEM Trouble Cause Remedy Landing gear extension Landing gear actuator circuit Reset circuit breaker and system fails to operate. breaker open. and determine cause for open circuit breaker.
  • Page 589 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 (Sheet 1 of 4) TROUBLESHOOTING HYDRAULIC SYSTEM Trouble Cause Remedy Pump stops during gear Landing gear actuator Reset circuit breaker and extension circuit breaker opens determine cause for overload.
  • Page 590 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 (Sheet 1 of 4) TROUBLESHOOTING HYDRAULIC SYSTEM Trouble Cause Remedy Pump running intermittently Leakage of high pressure Remove pump and replace after gear has retracted. check valve. check valve.
  • Page 591 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 29-00-00 PAGE 9 3I15 May 30/07...
  • Page 592 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 10 29-00-00 May 30/07 3I16...
  • Page 593 (1) Position assembled pump, bracket, and pump mount on pump deck in airplane. (2) Secure pump assembly to deck by installing the three AN3-10 bolts with one MS35489-64 washer under each bolt head and three No. 5712-45 (Piper P/N 494 192) washers between Piper mount assembly and pump deck.
  • Page 594 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Oildyne Hydraulic Pump Figure 1 (Sheet 1 of 2) PAGE 2 29-10-00 May 30/07 3I18...
  • Page 595 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Oildyne Hydraulic Pump Figure 1 (Sheet 2 of 2) 29-10-00 PAGE 3 3I19 May 30/07...
  • Page 596 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (5) Install anti-splash cover (Piper P/N 96374-0) by installing the four attaching screws, (6) Install the ABS nose gear cover. Field Service Field service of Oildyne hydraulic pump is limited to motor replacement and removal, cleaning, and inspecting the hydraulic fluid reservoir.
  • Page 597 MAINTENANCE MANUAL (3) Oildyne Hydraulic Pump to Piper Bracket (See Figure 1.) (a) If bracket was removed from pump mount, install bracket to Piper pump mount with four MS24693-S298 screws. (b) Position pump assembly on bracket so that tapped holes in oildyne adapter align with bolt holes on bracket.
  • Page 598 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Landing Gear Free Fall Valve Assembly Inspection and Repair This valve is located directly above the nose wheel actuating cylinder. Inspection is limited to determining if any signs of hydraulic fluid leakage are evident around the seam between the end fitting and valve body, and around the periphery of the piston assembly shaft.
  • Page 599 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Free-Fall Valve Assembly Figure 2 29-10-00 PAGE 7 3I23 May 30/07...
  • Page 600 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Hydraulic Lines Removal and Installation Remove damaged hydraulic lines by disconnecting fittings at both ends and disconnecting where secured by brackets. See Figure 2, 6-00-00, as an aid in locating attaching brackets and bends in lines.
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  • Page 602 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 3J2 THRU 4B24 INTENTIONALLY BLANK PAGE 10 29-10-00 Feb 28/09...

  • Page 603: Ice And Rain Protection

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER ICE AND RAIN PROTECTION...
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  • Page 605 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 30 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 30-60-00 May 30/07 30-List of May 30/07 Effective Pages May 30/07 May 30/07 May 30/07 30-Table of Contents...

  • Page 606: List Of Effective Pages

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  • Page 607 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 30 - ICE AND RAIN PROTECTION TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 30-00-00 Description and Operation AIRFOILS 30-10-00 4C13 Description and Operation 4C13 Troubleshooting 4C13 Inspection...
  • Page 608 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 30 - ICE AND RAIN PROTECTION TABLE OF CONTENTS (continued) SUBJECT SECTION PAGE GRID NO. PROPELLERS 30-60-00 4D17 Description and Operation 4D17 Troubleshooting 4D22 Using the Ammeter 4D22 Helpful Tips...
  • Page 609 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 30 - CONTENTS PAGE 3 May 30/07...
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  • Page 611 MAINTENANCE MANUAL GENERAL The material contained in this chapter provides information for general maintenance characteristic of the ice protection system. If further information is necessary contact the product manufacturer or Piper Service Representative. Description and Operation The ice protection system is actually made up of five separate systems: a pneumatic deice system (30-10-00, Figure 1);...
  • Page 612 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL The propeller deice system, which can be installed by itself, or included in a package with others of the ice protection system, is designed for both the two and three blade propeller installations. Each propeller deice system consists of: (1) an electrically heated boot bonded to each blade;...
  • Page 613 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 30-00-00 PAGE 3 4C11 May 30/07...
  • Page 614 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 4 30-00-00 May 30/07 4C12...
  • Page 615 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL AIRFOILS Airfoil deicing is performed by the pneumatic deicing system. The system utilizes inflatable boots to clear ice off the leading edges of the wings, vertical stabilizer, and stabilator. The boots are of a fabric reinforced rubber construction containing built-in span wise inflation tubes.
  • Page 616 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 TROUBLESHOOTING PNEUMATIC DEICE SYSTEM Trouble Cause Remedy Deicers do not inflate. Both Open circuit breaker. Push circuit breaker to set. engines operating at minimum cruise rpm or either engine...
  • Page 617 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Pneumatic Deice System Installation Figure 1 30-10-00 PAGE 3 4C15 May 30/07...
  • Page 618 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Inspection A ground check of the entire deicer system should be made at least every 100 hours time-in-service. Before checking the system, all deicers should be inspected for damaged areas and repaired according to the procedure in this section outlining cold patch or vulcanized repairs.
  • Page 619 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Pneumatic Deicer Boots Operation Figure 2 (3) Inspect all hose connections which form a part of the pneumatic deicing system. Replace deteriorated sections on non-kink hose. (4) Check the operation of the boots and the operating pressure of the system as outlined in this section.
  • Page 620 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) LEFT AND RIGHT CONTROL VALVE SOLENOIDS: Activate the De-Ice System Switch and run engines. (a) Check both Control Valve Solenoids actuate. (An audible “CLICK” can be heard or the action can be felt by holding a hand against the unit.)
  • Page 621 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Component Maintenance and Replacement Filters Air supply for the system is supplied through the vacuum system. See 37-10-00 for additional information. Control Valves After each 100 hours of engine operation, the valve poppet and internal lining of the control valve can become coated with a film of dried oil causing the valve to stick.
  • Page 622 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Pneumatic Boots WARNING: CEMENTS AND SOLVENTS USED TO REMOVE AND INSTALL DEICERS ARE EXTREMELY FLAMMABLE AND TOXIC. EXTINGUISH OPEN FLAMES. AVOID SPARKS. USE IN WELL-VENTILATED AREA. AVOID SKIN CONTACT AND/OR PROLONGED BREATHING OF VAPORS.
  • Page 623 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 3 FILLER EPOXIES (PIR-PMS-C1004, Rev. G.) Supplier Supplier P/N Mix Ratio Piper P/N Lord 305-1 (305-1:305-2) 279-162 305-2 By Weight: 279-163 1.2:1 By Volume: Henkel Corp. EA 960F (Part A:Part B)
  • Page 624 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (d) Remove the sump plugs from the air connection grommets. In some cases, it will be necessary to remove sections of doped fabric used to cover the air connection holes.
  • Page 625 A851B fuel barrier and top coat paint are not semi-conductive, and therefore the 1/4 inch gap must be free of these materials. (c) Apply edge filler AC665B-1/2 (Piper Code 279-065) to fair full thickness de-icer edges to adjacent A/C structure along upper wing de-icer, around cutouts, recessed edges, and/or between two de-icers which are installed close together.
  • Page 626 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (5) Adhesion Test Using excess boot material trimmed from the ends of any wing and empennage deicers, prepare one test specimen for each deicer installed. This specimen should be a 1 x 8 inch full thickness strip of boot material cemented to the wing skin adjacent to installed boot following the identical procedure used for installation.
  • Page 627 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 4 MATERIAL AND SUPPLIES FOR COLD REPAIR Part No. Quantity Description 74451-C Cold Patch Repair Kit (FSN1650-856-7939) (B. F. Goodrich Co.) 74-451-11 1/1 pt. can A-56-B Conductive Cement 74-451-16 30 pcs.
  • Page 628 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Apply the patch to the deicer with an edge, or the center adhering first. Work down the remainder of the patch carefully to avoid trapping air pockets. Thoroughly roll the patch with stitcher-roller, Part No.
  • Page 629 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (d) Loose Surface Ply in Tube Area. Loose surface ply in tube area is usually an indication of the deicer starting to flex fail. This type of failure is more easily detected in the form of a blister under the surface ply when deicer is pressurized.
  • Page 630 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Icex Application WARNING: USE ONLY WITH ADEQUATE VENTILATION. AVOID PROLONGED OR REPEATED BREATHING OF VAPOR. AVOID PROLONGED OR REPEATED CONTACT WITH SKIN. KEEP COMPOUND AWAY FROM OPEN FLAMES AND ELECTRIC HEATERS;...
  • Page 631 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Resurfacing Conductive Cement WARNING: CEMENTS AND SOLVENTS USED FOR RESURFACING ARE FLAMMABLE AND THEIR FUMES SLIGHTLY TOXIC. THEREFORE, ALL WORK SHOULD BE DONE IN A WELL VENTILATED AREA AWAY FROM ANY SPARKS OR FLAMES.
  • Page 632 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Final Test and Adjustment (PIR-PPS60054-2, Rev. D.) Remove the hatch covers on each nacelle and disconnect the line between the control valve and check valve. On each installation install a pressure gauge having a capacity of 0 to 25 psi in between the two valves.
  • Page 633 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 30-10-00 PAGE 19 May 30/07...
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  • Page 635 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL PITOT AND STATIC Both a heated pitot and heated stall warning system are available. It is significant to note that although they are separate systems in themselves, they are installed as an individual system controlled by a single switch located among the deice switches installed directly in the instrument panel above the throttle quadrant.
  • Page 636 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Heated Pitot & Stall Warning System Installation Seneca IV Figure 1 (Sheet 1 of 2) PAGE 2 30-30-00 May 30/07 4D10...
  • Page 637 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Heated Pitot & Stall Warning System Installation Effectivity Figure 1 (Sheet 2 of 2) Seneca V 30-30-00 PAGE 3 4D11 May 30/07...
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  • Page 639: Windows And Windshield

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL WINDOWS AND WINDSHIELD Heated Windshield Panel The heated windshield panel is a rectangular glass panel containing electrically heated wires imbedded in the glass which is mounted in a metal frame. The assembly is mounted on the exterior side of the pilot’s windshield and is hinged at its base to facilitate windshield cleaning.
  • Page 640 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Windshield Heat Figure 1 PAGE 2 30-40-00 May 30/07 4D14...
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  • Page 643 NOTE: Heating may begin at any phase in the cycle depending on the timer position when the switch was turned off from previous use. Slip ring assembly - connected to the hub of each propeller (Seneca IV); or, connected to the engine crankshaft flange (Seneca V)
  • Page 644 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 4) TROUBLESHOOTING PROPELLER DEICE SYSTEM Trouble Cause Remedy Ammeter shows zero current Tripped circuit breaker. Locate and correct short (All 4 phases of the 2 minute before setting circuit cycle –...
  • Page 645 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 4) TROUBLESHOOTING PROPELLER DEICE SYSTEM Trouble Cause Remedy Ammeter shows normal current Inner and outer deicers Locate and repair incorrect part of cycle, low current rest heating same phase connections.
  • Page 646 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 3 of 4) TROUBLESHOOTING PROPELLER DEICE SYSTEM Trouble Cause Remedy Ammeter shows normal Ground between timer and Disconnect leads at brush current part of cycle, excess brush block.
  • Page 647 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 4 of 4) TROUBLESHOOTING PROPELLER DEICE SYSTEM Trouble Cause Remedy Ammeter flicks between Timer cycles erratically. Test timer. 34 second phase periods. (cont.) Radio noise or interference Brushes “arcing.”...
  • Page 648 If not, refer to the appropriate entry of the troubleshooting chart. (2) (Seneca IV, two blade prop) With engines stopped, turn deicer switch ON and feel deicers on propellers for proper sequence of heater operation. The starting point is not important but sequence is vital and must be: Right Outboard, Right Inboard, Left Outboard and Left Inboard Heaters, in that order.
  • Page 649 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Propeller Deice Installation Figure 1 (Sheet 1 of 3) 30-60-00 PAGE 7 4D23 May 30/07...
  • Page 650 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Propeller Deice Installation Figure 1 (Sheet 2 of 3) PAGE 8 30-60-00 May 30/07 4D24...
  • Page 651 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Propeller Deice Installation Figure 1 (Sheet 3 of 3) 30-60-00 PAGE 9 May 30/07...
  • Page 652 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Deicer Cycling Sequence Seneca IV - Two Blade Figure 2 (Sheet 1 of 4) PAGE 10 30-60-00 May 30/07...
  • Page 653 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Deicer Cycling Sequence Effectivity Figure 2 (Sheet 2 of 4) Two Blade - Seneca IV 30-60-00 PAGE 11 May 30/07...
  • Page 654 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Deicer Cycling Sequence Seneca V - Two Blade Figure 2 (Sheet 3 of 4) PAGE 12 30-60-00 May 30/07...
  • Page 655 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Deicer Cycling Sequence Effectivity Figure 2 (Sheet 4 of 4) Three Blade 30-60-00 PAGE 13 May 30/07...
  • Page 656 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 100 Hour Inspection (1) Remove cowling. (2) Conduct 50 hour inspection. (3) Check for radio noise or radio compass interference by operating the engine at near takeoff power with radio gear ON while turning deicer switch ON and OFF. If noise or interference occurs with deicer switch ON and disappears when switch is OFF, see troubleshooting chart.
  • Page 657 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Using Dial Indicator Figure 3 Centering of Brushes on Slip Rings Figure 4 30-60-00 PAGE 15 May 30/07...
  • Page 658 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL {.032-.094} SLIP RING/SHEAVE ASSY. (REF.) MODULAR BRUSH ASSY. ROTATION OF SLIP RINGS 2°0' ±0°30' SLIP RING/SHEAVE ASSY. (REF.) 2°0' ±0°30' MODULAR ROTATION OF BRUSH ASSY. SLIP RINGS RIGHT ENGINE {.032-.094}...
  • Page 659 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Brush Assemblies WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Brush Module Replacement Brush modules should be replaced when .375 inch of brush material remains; brush modules must be replaced when .250 inch remains.
  • Page 660 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Modular Brush Assembly 3E2062-2 Figure 8 Typical Module Stacking Arrangements Figure 9 PAGE 18 30-60-00 May 30/07 4E10...
  • Page 661 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Alignment of New Brushes Any time the brush block assembly is dismounted, the alignment at reinstallation must be checked as described in step (7) under “100 Hour Inspection.” Brush Block Alignment A brush alignment template is available for adjusting brush alignment.
  • Page 662 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 20 30-60-00 May 30/07 4E12...
  • Page 663 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Deicer Boots WARNING: CEMENTS AND SOLVENTS USED TO REMOVE AND INSTALL DEICERS ARE EXTREMELY FLAMMABLE AND TOXIC. EXTINGUISH OPEN FLAMES. AVOID SPARKS. USE IN WELL-VENTILATED AREA. AVOID SKIN CONTACT AND/OR PROLONGED BREATHING OF VAPORS.
  • Page 664 The materials and tools listed below are commercially available and are not supplied by B.F. Goodrich in kit form: Cement 1300L (Minnesota Mining & Mfg. Co.) (*Piper P/N 912-019) Filler EC801 (6 Hour) *Piper P/N 279-047) Sealer A-56-B *Piper P/N 912-018...
  • Page 665 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Installation of Deicer Boot Figure 10 Blade Preparation (McCauley Propellers only) CAUTION: CLEANLINESS OF METAL AND RUBBER PARTS CANNOT BE TOO HIGH STRESSED. ONLY PERFECTLY CLEAN SURFACES WILL ASSURE MAXIMUM ADHESION.
  • Page 666 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Cement Application (McCauley Propellers only) (1) Using a marker pencil, mark a centerline on the glossy side of the deicer. (2) Moisten a clean cloth with MEK or acetone and clean the unglazed surface of the deicer, changing cloth frequently to avoid contamination of the clean area.
  • Page 667 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Wrinkled Deicers Figure 11 Preparation and Application of Sealer (McCauley Propellers only) Deicers loosened due to destruction of adhesive bond by lubricants do not respond well to recementing. Therefore, removal, cleaning, and reinstallation of the deicers are recommended.
  • Page 668 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 5 MIXING OF MATERIALS Material Manufacturing & No. Mixing Proportions Filler EC801 (6 Hr.) (Qt.) Base 100 parts by weight. Piper P/N 279 047 Accelerator 10 parts by weight.
  • Page 669 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Sealer Application (Boot) Figure 12 Deicer Wiring Harness Two Bladed Propellers (Refer to Figure 13.) The deicer wiring harness must be installed to the propeller counterweight as follows: (1) Install deicer harness through 9/32 inch hole in counterweight.
  • Page 670 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Two Bladed Propeller Deicer Harness Installation Figure 13 PAGE 28 30-60-00 May 30/07 4E20...
  • Page 671 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Three Bladed Propeller Deicer Harness Installation Figure 14 30-60-00 PAGE 29 4E21 May 30/07...
  • Page 672 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Balancing To assure balance of the propeller assembly, the original balancing weights or their equivalents must be reinstalled. The weights must be left in the original position on the propeller hub. The restrainer and weights should not interfere with any part of the propeller assembly under any condition.
  • Page 673 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 30-60-00 PAGE 31 4E23 May 30/07...
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  • Page 675 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL DETECTION Ice Detection Light This light is used in conjunction with the pneumatic deicing system and will aid the pilot to detect any ice formation on the left wing leading edge during night flying operations.
  • Page 676 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 30-80-00 May 30/07...
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  • Page 679: Indicating / Recording Systems

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER INDICATING / RECORDING SYSTEMS...
  • Page 680 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK...
  • Page 681 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 32 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 31-List of May 30/07 Effective Pages May 30/07 31-Table of Contents May 30/07 May 30/07 31-50-00...

  • Page 682: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 31 - LIST OF EFFECTIVE PAGES May 30/07...
  • Page 683 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 31- INDICATING / RECORDING SYSTEMS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. CENTRAL WARNING SYSTEMS 31-50-00 4F11 Annunciator Panel 4F11 Troubleshooting 4F11 Light Tests 4F16 Rigging Fuel CROSSFEED Annunciator...
  • Page 684 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 31 - CONTENTS May 30/07 4F10...

  • Page 685: Central Warning Systems

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CENTRAL WARNING SYSTEMS Annunciator Panel (See 91-31-50 for electrical schematics.) The annunciator panel provides a visual warning of possible malfunctions, including failure alert and precautionary warnings. Seneca IV models, an annunciator panel light cluster is mounted in the top of the instrument panel just above the pilot's altimeter.
  • Page 686 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 89452 AC L ALT GEAR L VACUUM L START FLAPS IN INOP WARN OIL PRESS INOP ENGAGE TRANSIT LOW BUS BAGGAGE VOLTAGE DOOR LEFT HEATER R START R VACUUM R ALT...
  • Page 687 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 ANNUNCIATOR PANEL TROUBLESHOOTING Trouble Cause Remedy “Ground Applied” warning ANNUN Circuit breaker Reset (push IN) breaker on lights fail to operate. disengaged (OUT). circuit breaker panel. All lights fail to operate.
  • Page 688 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 SENECA IV ANNUNCIATOR PANEL FUNCTION DESCRIPTIONS Nomenclature Color Cause of Illumination L or R OVERBOOST AMBER Illuminates when engines manifold pressure exceeds 39.5 to 40 inches of mercury.
  • Page 689 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 3 SENECA V ANNUNCIATOR PANEL FUNCTION DESCRIPTIONS Nomenclature Color Cause of Illumination GEAR WARN Illuminates when gear is in neither the full up nor the full down position. Illuminates when gear selector switch is in up position while airplane is on ground with weight on wheels.
  • Page 690 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Light Tests Seneca IV The annunciator lights may be tested as follows: NOTE: The sequence of the test may be varied at the option of the mechanic. (a) Press the annunciator test button to ensure that the annunciators illuminate.
  • Page 691 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (c) With fuel pumps OFF, move the left engine fuel control lever to the X feed position and check that the crossfeed annunciator illuminates. Move the left engine fuel control lever to the ON position.
  • Page 692 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 8 31-50-00 May 30/07 4F18...
  • Page 693 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 31-50-00 PAGE 9 4F19 May 30/07...
  • Page 694 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 4F20 THRU 4F24 INTENTIONALLY BLANK PAGE 10 31-50-00 May 30/07 4F20...

  • Page 695: Landing Gear

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER LANDING GEAR...
  • Page 696 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK...
  • Page 697 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 32 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 32-20-00 (cont) May 30/07 32-List of Feb 28/09 Effective Pages May 30/07 May 30/07 May 30/07...

  • Page 698: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 32 LIST OF EFFECTIVE PAGES (continued) CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 32-60-00 May 30/07 May 30/07 May 30/07 May 30/07 May 30/07 May 30/07 May 30/07...
  • Page 699 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 32 - LANDING GEAR TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 32-00-00 Description Troubleshooting 4G10 MAIN GEAR AND DOORS 32-10-00 4G17 Main Gear Oleo 4G17 Disassembly 4G17...
  • Page 700 Main Gear Actuating Cylinder Removal Installation Gear Actuating Cylinder Service Landing Gear Retraction System Functional Test Seneca IV’s and Seneca V S/N’s 3449001 thru 3449300, less 3449161 Seneca V S/N’s 3449161 and 3449301 & up WHEELS AND BRAKES 32-40-00 4I15...
  • Page 701 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 32 - LANDING GEAR TABLE OF CONTENTS (continued) SUBJECT SECTION PAGE GRID NO. WHEELS AND BRAKES (Continued) 32-40-00 Parking Brake Valve Removal Installation Parking Brake Valve Service Brake Bleeding...
  • Page 702 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 4 32 - CONTENTS May 30/07...
  • Page 703 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL This chapter contains instructions for overhauling, inspecting and adjusting the various components of the PA-34-220T landing gear and brake system, with the exception of the hydraulic pump and lines - see Chapter 29 for those components.
  • Page 704 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Troubleshooting CAUTION: WHEN NECESSARY TO RAISE OR LOWER EITHER THE NOSE GEAR OR THE MAIN GEAR MANUALLY, THE FREE-FALL VALVE KNOB SHOULD BE PULLED FULL OUT TO PREVENT A BUILDUP OF UNNECESSARY PRESSURE ON THE ACTUATING CYLINDERS AND CONNECTING HYDRAULIC LINES.
  • Page 705 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 4) TROUBLESHOOTING LANDING GEAR Trouble Cause Remedy Green gear down lights Gear down limit switch Replace switch. fail to go out with gear failed. in transit or retracted.
  • Page 706 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 4) TROUBLESHOOTING LANDING GEAR Trouble Cause Remedy Nose landing gear fails to fully Binding or distortion Check that the trunnion, lock down during emergency drag link, and all parts of gear extension (i.e.
  • Page 707 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 3 of 4) TROUBLESHOOTING LANDING GEAR Trouble Cause Remedy Nose landing gear shimmies Internal wear in centering Replace shimmy during fast taxi, takeoff, or springs. dampener. landing.
  • Page 708 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 4 of 4) TROUBLESHOOTING LANDING GEAR Trouble Cause Remedy Main landing gear shimmies Tire out of balance. Check balance and replace during fast taxi, takeoff, or tire if necessary.
  • Page 709 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 32-00-00 PAGE 7 4G15 May 30/07...
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  • Page 711 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAIN GEAR AND DOORS Main Gear Oleo Disassembly (See Figure 1.) The main gear oleo assembly may be removed and disassembled from the oleo housing with the gear removed for or installed in the airplane. The following instructions assume the gear is still installed.
  • Page 712 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Main Gear Oleo Strut Assembly Figure 1 (Sheet 1 of 2) PAGE 2 32-10-00 May 30/07 4G18...
  • Page 713 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Main Gear Oleo Strut Assembly Figure 1 (Sheet 2 of 2) 32-10-00 PAGE 3 4G19 May 30/07...
  • Page 714 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Repair of the oleo is limited to smoothing out minor scratches, nicks and dents and replacement of parts. NOTE: Check all impregnated bearing surfaces, such as Garlock DU bearings (06U08 in the lower truss link assembly), for wear.
  • Page 715 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (7) Reconnect the brake hose clamps and the fitting to the actuating cylinder. Bleed as described in section on "Brakes." (8) Lubricate gear assembly as described in 12-20-00. (9) Service oleo strut with fluid and air as described in 12-10-00.
  • Page 716 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Main Gear Installation Figure 2 (Sheet 1 of 2) PAGE 6 32-10-00 May 30/07 4G22...
  • Page 717 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Main Gear Installation Figure 2 (Sheet 2 of 2) 32-10-00 PAGE 7 4G23 May 30/07...
  • Page 718 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Inspect the gear down lock spring for the following: (a) Excessive wear or corrosion, especially around the hooked ends of the spring. A spring should be rejected if wear or corrosion exceeds one-quarter the diameter of the spring.
  • Page 719 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Aligning Main Gear Figure 3 32-10-00 PAGE 9 May 30/07...
  • Page 720 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) Reconnect the brake line in the gear well. (5) The gear truss assembly may be installed as follows: NOTE: If the reason for gear removal was due to wing replacement, it may be necessary to remove the upper truss link support from the old wing to install on the new wing.
  • Page 721 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Toe-In/Toe-Out Adjustment Figure 4 CHART 2 TOE-IN AND TOE-OUT CORRECTION CHART TOE-IN SHIM WASHERS WASHER AN 174 TOE-OUT WASHERS UNDER HEAD UNDER NUT BOLT 0° AN960-416 AN960-416 (3) 0° 33"...
  • Page 722 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (7) If a new link on the top left main gear has to be installed or it had to be reversed during the alignment check, it will be necessary to check the gear safety switch (squat switch) bracket for engagement and locking in place.
  • Page 723 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 32-10-00 PAGE 13 May 30/07...
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  • Page 725: Nose Gear And Doors

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL NOSE GEAR AND DOORS Nose Gear Oleo Assembly Inspection (1) Clean all parts using a suitable dry type cleaning solvent. (2) Inspect components of the landing gear as follows: (a) Bearings and bushings for excessive wear, corrosion, scratches and overall condition.
  • Page 726 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Nose Gear Oleo Strut Assembly Figure 1 (Sheet 1 of 2) PAGE 2 32-20-00 May 30/07...
  • Page 727 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Nose Gear Oleo Strut Assembly Figure 1 (Sheet 2 of 2) 32-20-00 PAGE 3 May 30/07...
  • Page 728 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (8) Place the required spacer washers between the tiller and oleo/trunnion mounting surface. Grease them as specified in 12-00-00. (9) Align and insert the bottom of the tiller in the oleo cylinder. Install and safety the four retaining bolts with 0.041 safety wire.
  • Page 729 In the Seneca IV; and Seneca V S/N’s 3449001 through 3449312, less 3449262: procure and install Piper Kit No. 767-359, if the steel Actuator Mount Bracket is discrepant and must be replaced. This kit includes the latest design actuator mount bracket (i. e. - P/N 95724-006) and new, required, hardware for attaching the Nose Gear Retraction Link Assembly P/N 95712-004.
  • Page 730 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Nose Gear Installation Figure 2 (Sheet 1 of 2) PAGE 6 32-20-00 May 30/07 4H12...
  • Page 731 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Nose Gear Installation Figure 2 (Sheet 2 of 2) 32-20-00 PAGE 7 4H13 May 30/07...
  • Page 732 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Inspection (1) General (a) Clean all parts with a suitable dry type cleaning solvent. (b) Inspect gear components for the following unfavorable conditions: Bolts, bearings and bushings for excessive wear, corrosion and damage.
  • Page 733 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Service Wear Limits Figure 3 32-20-00 PAGE 9 4H15 May 30/07...
  • Page 734 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Tunnel Bracket Installation Inspection Figure 4 PAGE 10 32-20-00 May 30/07 4H16...
  • Page 735 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (6) 100 Hour Nose Gear Drag Link Inspection (See Figure 5.) The drag links function to lock and retain the gear in its down position by traveling to a specific through center locked position.
  • Page 736 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Drag Link Installation and Adjustment Figure 5 PAGE 12 32-20-00 May 30/07 4H18...
  • Page 737 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Nose Gear Trunnion Inspection Figure 6 32-20-00 PAGE 13 4H19 May 30/07...
  • Page 738 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Removal (See Figure 2.) WARNING: DO NOT ATTEMPT TO REMOVE THE SPRING FROM THE SHAFT ASSEMBLY OF THE NOSE GEAR CENTERING SPRING ASSEMBLY. THIS SPRING IS HELD UNDER COMPRESSION BY TWO BUSHINGS AND TWO PINS WITH FUSED HEADS.
  • Page 739 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (11) Retract and free fall the landing gear at least three times. Remove the down lock link, shorten it by 1/2 turn and reinstall. (12) The down and locked limit switch should be adjusted to have it actuated when the retraction link is back against its stop.
  • Page 740 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (5) Clamp rudder pedals to align in a lateral position. (See Figure 7.) (6) Adjust the rod end bearings of each steering bungee to align the nose wheel with the chalk line and to bring the rudder pedals into neutral angle fore and aft.
  • Page 741 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Nose Gear Doors (See Figure 2.) Inspection (1) Clean all components with a suitable cleaning solvent. (2) Inspect doors for damage, loose or damaged hinges and brackets. (3) Inspect retraction rods for damage and rod end bearings for corrosion.
  • Page 742 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) If doors sag when fully retracted, tighten link assembly. If doors are too tight, loosen link assembly. (5) Check all rod ends for adequate thread engagement and for safety and tightness of jam nuts.
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  • Page 745: Extension And Retraction

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL EXTENSION AND RETRACTION Nose Gear Actuating Cylinder (See Figure 1.) Removal (1) Place airplane on jacks. (See Jacking, 7-10-00.) (2) Disconnect hydraulic lines from actuating cylinder and cover open line ends to prevent contamination.
  • Page 746 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Main Gear Actuating Cylinder Removal (1) Place airplane on jacks. (See Jacking, 7-10-00.) (2) Disconnect hydraulic lines from actuating cylinder and cover open line ends to prevent contamination. (3) Disconnect gear down lock spring from swivel fitting at upper end of spring.
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  • Page 748 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Landing Gear Retraction System Functional Test Seneca IV’s and Seneca V S/N’s 3449001 thru 3449300, less 3449161 (1) Setup Before proceeding with this test, ensure that the: (a) Tires and struts are properly inflated (See 6-00-00 and 12-10-00).
  • Page 749 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (e) Move left throttle to its mid-travel position. Check warning horn continues to sound and red GEAR WARN remains ON. Close left throttle. Move the right throttle to its mid-travel position. Check warning horn continues to sound and red GEAR WARN remains ON.
  • Page 750 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Manually “break” the left main gear down lock. Check that the: Hydraulic pump motor RUNS. Correct green safe light is OUT. Red GEAR WARN annunciator remains ON. The horn does NOT sound.
  • Page 751 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) Procedure NOTE: Perform the following tests and checks in the sequence shown. If the system fails to respond as indicated, the malfunction must be corrected before proceeding with the next step.
  • Page 752 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (m) Taxi light to “OFF” position. (n) Gear Selector Switch “DOWN”. (See NOTE below.) (o) Free-fall knob “IN”. (See NOTE below.) (p) “Landing Gear Pump” Circuit Breaker “IN”. (See NOTE below.) Verify the following: Three green safe lights on.
  • Page 753 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (y) Gear selector switch “UP” and taxi light switches on. Verify the following: Pump motor operates. Three green safe lights out. Red unsafe light on until all gear are up; then off.
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  • Page 757: Wheels And Brakes

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL WHEELS AND BRAKES Nose Wheel Removal and Disassembly (See Figure 1.) (1) Jack the airplane enough to raise the nose wheel clear of the ground. (2) To remove the nose wheel, first remove the nut from one end of the axle rod and slide out the rod and axle plugs.
  • Page 758 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Inspection (1) Visually check all parts for cracks, distortion, defects and excess wear. (2) Check wheel bolts for stripped or damaged threads. (3) Check internal diameter of felt grease seals. Replace the felt grease seal if surface is hard or gritty.
  • Page 759 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Main Wheel Assembly Figure 2 Bearing Cup Replacement (1) Removal: (a) Insert wheel half into boiling water for 15 minutes or place in an oven not exceeding 250°F (121°C) for 15 minutes.
  • Page 760 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Inspection Inspection of the main assembly is the same as that given for the nose wheel. See Inspection of Nose Wheel. Assembly and Installation (See Figure 2.) (1) Determine that the bearing cup is properly installed in each wheel half.
  • Page 761 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Wheel Brake Assembly Adjustment of brake lining clearance is unnecessary since they are self-adjusting. Inspection of the lining is necessary and may be inspected visually while installed on the airplane. The linings are of riveted type and should be replaced if the thickness of any one segment becomes worn below .099 of an inch or if...
  • Page 762 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Removal and Installation of Anchor Bolts Figure 4 PAGE 6 32-40-00 May 30/07 4I20...
  • Page 763 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (7) The following procedure should be used when removing anchor bolts: (a) Position cylinder assembly on a holding fixture. (See Figure 4.) (b) Use a suitable arbor press and remove the anchor bolt from the cylinder body.
  • Page 764 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Toe Brake Installation Figure 5 PAGE 8 32-40-00 May 30/07 4I22...
  • Page 765 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Toe Brake Cylinder (See Figure 5.) Removal (1) Disconnect upper and lower lines from the cylinder being removed. Cap lines to prevent fluid leakage or drain fluid from brake reservoir and master cylinder.
  • Page 766 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Cleveland 10-30 Toe Brake Cylinder Figure 6 Parking Brake Valve Assembly Figure 7 PAGE 10 32-40-00 May 30/07 4I24...
  • Page 767 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Parking Brake Valve (See Figure 7.) Removal (1) Disconnect the parking brake cable from the valve actuating arm. (2) Disconnect the fluid lines from the valve. (3) Remove the screws that attach the valve to its mounting bracket.
  • Page 768 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Brake Bleeding Gravity Procedure (1) On both main landing gear wheel brake assemblies, attach a clear plastic hose to the brake bleeders and extend into container partially filled with hydraulic fluid, MIL-H-5606. The ends of this hose should be submerged in the fluid.
  • Page 769 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Brake System Leak Check Pull firmly on the hand brake until resistance has built up and actuate the locking mechanism. After the system has stood for approximately 10 minutes, the handle should be checked for the same resistance.
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  • Page 773: Position And Warning

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL POSITION AND WARNING Nose Landing Gear Limit Switches NOTE: All limit switches adjustments should be made with airplane on jacks. Do not bend actuator springs mounted on the limit switches.
  • Page 774 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Adjust Nose Gear Down Limit Switch Figure 1 PAGE 2 32-60-00 May 30/07...
  • Page 775 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Down Limit Switch Adjustment (See Figure 2.) The gear down limit switch is mounted on the lower drag link of each main gear. The switch should be adjusted to allow it to actuate when the down lock hook has entered the locked position and is contacting the pin, thus turning the green light on in the cockpit.
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  • Page 777 Gear Warning Switches Throttle Micro-switch (See Figure 3.) (Seneca IV’s and Seneca V S/N’s 3449001 thru 3449300, less 3449161) The throttle switch is utilized to activate the gear up warning horn if the gear is still up when the throttles are pulled below 14 ± 2 inches manifold pressure.
  • Page 778 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (e) With the warning horn operating, lower the landing gear to determine whether the horn ceases to operate when the gear are down and locked. Turn OFF master switch and remove airplane from jacks.
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  • Page 781 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER LIGHTS 4J15...
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  • Page 783 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 33 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 33-List of Feb 28/09 Effective Pages May 30/07 33-Table of Contents May 30/07 May 30/07 33-10-00...

  • Page 784: List Of Effective Pages

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  • Page 785 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 33 - LIGHTS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. FLIGHT COMPARTMENT 33-10-00 4J21 Troubleshooting 4J21 Dome Panel Flood/Map Lights 4J21 Bulb Replacement 4J21 Rheostat Replacement 4J21 Instrument Post Lights...
  • Page 786 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 33 - LIGHTS TABLE OF CONTENTS (continued) SUBJECT SECTION PAGE GRID NO. EXTERIOR (continued) 33-40-00 Landing and Taxi Lights 4K11 Nose Gear Mounted Landing and Taxi Lights 4K11 Removal...

  • Page 787: Flight Compartment

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL FLIGHT COMPARTMENT This airplane is equipped with pilot and copilot overhead instrument panel/map lights, instrument post lights, switch lights, and avionics lights. The instrument post lights, switch lights, and avionics lights are controlled by independent dimmer controls located on the lower left instrument panel just below the remote compass switches.
  • Page 788 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (7) Engage FLOOD (push IN) circuit breaker and check correct operation of light. Disengage FLOOD (pull OUT) circuit breaker. (8) Install dome panel. Tighten nut securing rheostat to panel (9) Install rheostat knob and tighten allen nut.
  • Page 789 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Switch Lights All rocker type switches are internally lit with two miniature bulbs installed behind the switch cap. CAUTION: BEFORE WORKING ON ANY SWITCH OR DIMMER CONTROL, ENSURE BATT SWITCH IS OFF AND BATTERY CIRCUIT BREAKER IS PULLED OUT.
  • Page 790 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Dimmer Controls There are three dimmer control potentiometers; one each for switch lights, instrument post lights, and avionics. The potentiometers operate individual control boxes located forward of the instrument panel.
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  • Page 793: Passenger Compartment

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL PASSENGER COMPARTMENT The three reading lights and both the forward and aft courtesy lights are standard equipment. They are each operated by individual switches. The courtesy lights are wired directly to the battery so that they may be turned ON with the BATT switch OFF.
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  • Page 795 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CARGO AND SERVICE COMPARTMENTS The forward baggage compartment lighting system is standard equipment. The light is activated automatically when the door is unlatched. The forward baggage compartment light is wired directly to the battery so that it will be activated when the baggage door is open.
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  • Page 797 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL EXTERIOR Exterior lighting consists of navigation (position) lights, anti-collision (strobe) lights, wing ice light, recognition lights and landing lights. With the exception of the wing ice light, switches for external lighting...
  • Page 798 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Vertical Stabilizer Strobe Light Lamp The light is located on the upper section of the vertical stabilizer. (1) Removal (Seneca IV) Loosen the screw in the clamp securing the light cover.
  • Page 799 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 89424 V TO FIN STROBE (SEE VIEW A) 101816 H TO LH WING STROBE (SEE VIEW A) TO RH WING STROBE (SEE VIEW A) VENDER SUPPLIED CONNECTOR POWER 1 (+)
  • Page 800 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Check interconnecting cables for shorts. CAUTION: WHEN DISCONNECTING THE POWER SUPPLY, ALLOW FIVE MINUTES OF BLEED DOWN TIME PRIOR TO HANDLING THE UNIT. (a) Disconnect the output cables from the power supply outlets.
  • Page 801 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Landing and Taxi Lights Seneca IV models, the landing and taxi lights consist of two 100 watt lamps which are located on a mounting fixture secured to the nose gear oleo strut housing. Both lamps are used for landing and one lamp is used while taxiing.
  • Page 802 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (d) Align the bracket longitudinally and secure in place with clamps. (e) The light beam angle may be adjusted by the adjustment screws at the sides of the bracket and tilting the mounting fixture as desired.
  • Page 803 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Nose Gear Mounted Landing/Taxi Light Adjustment Figure 3 Wing Tip Mounted Landing Lights (Seneca V only) (See Figure 4.) (1) Removal (a) Remove the appropriate Plexiglas lens. NOTE: Use care not to disturb adjustment bolts when removing landing light bulb(s).
  • Page 804 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (c) Install the three lamp retaining screws. (d) Check lamp function by turning BATT MAST switch on and selecting LNDG LIGHT switch on. (e) Place BATT MAST and landing light switch in OFF position.
  • Page 805 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Wing Tip Landing Light Adjustment Effectivity Figure 5 Seneca V 33-40-00 PAGE 9 4K15 May 30/07...
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  • Page 807 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER NAVIGATION...
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  • Page 809 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 34 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 34-20-00 (cont.) Feb 28/09 34-List of Feb 28/09 Effective Pages May 30/07 May 30/07 Feb 28/09...

  • Page 810: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 34 - LIST OF EFFECTIVE PAGES May 30/07...
  • Page 811 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 34 - NAVIGATION TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 34-00-00 Standard Meggitt EFIS Avidyne EFIS FLIGHT ENVIRONMENT DATA 34-10-00 5C11 Pitot and Static Systems 5C11 Description and Operation...
  • Page 812 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 34 - NAVIGATION TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. ATTITUDE & DIRECTION (continued) 34-20-00 Electronic Flight Instrument System (EFIS) Meggitt Option Electronic Attitude Director Indicator (EADI) (i.e. - PFD)
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  • Page 815 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Standard Traditional 3.25 inch flight instruments are installed as standard equipment. These instruments are face mounted, see 39-10-00 for removal and installation.
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  • Page 817: Flight Environment Data

    MAINTENANCE MANUAL FLIGHT ENVIRONMENT DATA WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) The instrument air system consists of pitot air and static air sources. The system supplies both pitot and static air pressure for the airspeed indicator, and static pressure for the altimeter, vertical speed indicator, and the triple indicator (cabin pressure differential, vertical speed, and altitude).
  • Page 818 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Pitot-Static System Figure 1 (Sheet 1 of 2) PAGE 2 34-10-00 May 30/07 5C12...
  • Page 819 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Pitot-Static System Figure 1 (Sheet 2 of 2) 34-10-00 PAGE 3 5C13 May 30/07...
  • Page 820 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 TROUBLESHOOTING PITOT AND STATIC SYSTEM Trouble Cause Remedy Heating element inoperative. Defective switch. Replace the switch. Grounded or open circuit. Check for continuity and repair. Defective heating element Replace the in pitot head.
  • Page 821 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (10) When equipped with the optional Meggitt or Avidyne EFIS: turn OFF the PFD (i.e. - EADI). (11) Remove the test fixture from the pitot head. (12) Attach static test fixture to the static port and pitot test port of the aircraft. Tape over the other static button.
  • Page 822 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Vertical Speed Indicator NOTE: For airplanes equipped with Avidyne Entegra EFIS, this function is performed soley by the Primary Flight Display (PFD). The vertical speed indicator measures the rate of changes in static pressure when the airplane is climbing or descending.
  • Page 823 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 2 TROUBLESHOOTING VERTICAL SPEED INDICATOR Trouble Cause Remedy Pointer does not set Aging of diaphragm. Reset pointer to zero by on zero. means of setting screw. Tap instrument while resetting.
  • Page 824 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Sensitive Altimeter NOTE: For airplanes equipped with Avidyne Entegra EFIS, the primary altimeter is the Primary Flight Display (PFD). The altimeter indicates pressure in feet above sea level. The indicator has three pointers and a dial scale.
  • Page 825 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 3 TROUBLESHOOTING ALTIMETER Trouble Cause Remedy Excessive scale error. Improper calibration Replace instrument. adjustment. Excessive pointer Defective mechanism. Replace instrument. oscillation. High or low reading. Improper venting. Eliminate leak in static...
  • Page 826 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Radar Altimeter The King KRA-10A radar altimeter system may be installed as optional equipment. The system makes use of an indicator, on/off switch, transmitter, and antenna, and provides above ground level (AGL) altitude information from 20 feet up to a maximum of 2500 feet.
  • Page 827 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL King Radar Altimeter Installation Figure 1 (c) Install antenna cable finger tight and secure with safety wire. (d) After checking security of installation, reinstall baggage compartment close-out panel. 34-10-00 PAGE 11...
  • Page 828 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Airspeed Indicator NOTE: For airplanes equipped with Avidyne Entegra EFIS, the primary airspeed indicator is the Primary Flight Display (PFD). The airspeed indicator provides a means of indicating the speed of the airplane passing through the air.
  • Page 829 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Outside Air Temperature Gauge (OAT) Seneca IV The OAT is internally lit. The only maintenance required is replacing a faulty instrument or a bad light bulb. The gauge must be removed to replace the light bulb.
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  • Page 831: Attitude And Direction

    See 39-10-00, Face Mounted Instruments - Removal and Installation. Standby Attitude Indicator WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) With the optional Avidyne Entegra Electronic Flight Instrument System installed;...
  • Page 832 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 TROUBLESHOOTING ATTITUDE DEVIATION INDICATOR Trouble Cause Remedy Bar fails to respond. Observe vacuum gauge If insufficient vacuum exist, for insufficient vacuum. check pump and tubing. Filter dirty. Clean or replace filter.
  • Page 833 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Air Driven Heading Indicator (Directional Gyro) The gyro stabilized heading indicator is a flight instrument incorporating an air driven gyro stabilized in the vertical plane. The gyro is rotated at high speed by lowering the pressure in the airtight case and simultaneously allowing filtered atmospheric air pressure to enter the instrument against the gyro buckets.
  • Page 834 Electronic Flight Instrument System (EFIS) - Single-side (Meggitt) Option WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Electronic Attitude Director Indicator (EADI) [i.e. - Meggitt MAGIC EFIS Primary Flight Display (PFD)] The Primary Flight Display (PFD) is a microprocessor-based color, liquid crystal (LCD) display system.
  • Page 835 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (d) Verify that the Configuration Data page displays the correct installation location (primary or secondary). (e) Remove power from the PFD to terminate Test Mode. Re-apply power to the PFD and start the display in Mission Operational Mode.
  • Page 836 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 3 (Sheet 1 of 3) TROUBLESHOOTING EADI (i.e. - MEGGITT PFD) Trouble Cause Remedy No display visible at power up. +28 VDC power missing. Check wiring & bus voltage.
  • Page 837 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 3 (Sheet 2 of 3) TROUBLESHOOTING EADI (i.e. -MEGGITT PFD) Trouble Cause Remedy Installation location on Configuration discretes 0 and 1 Check configuration Configuration Data page incorrect. not wired correctly.
  • Page 838 Electronic Horizontal Situation Indicator (EHSI) [i.e. - Meggitt MAGIC EFIS Navigation Display (ND)] WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) The Navigation Display (ND) is, like the Meggitt Primary Flight Display (PFD), a microprocessor- based color, liquid crystal (LCD) display system.
  • Page 839 PIPER AIRCRAFT, INC. PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V PA-34-220T, SENECA IV / V MAINTENANCE MANUAL MAINTENANCE MANUAL CHART 4 (Sheet 1 of 3) TROUBLESHOOTING EHSI (i.e. - MEGGITT ND) Trouble Cause Remedy No display visible at power up.
  • Page 840 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 4 (Sheet 2 of 3) TROUBLESHOOTING EHSI (i.e. - MEGGITT ND) Trouble Cause Remedy Barometric setting does not Stuck and/or buttons Check buttons change in EADI Display Down mode when the...
  • Page 841 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 4 (Sheet 3 of 3) TROUBLESHOOTING EHSI (i.e. -MEGGITT ND) Trouble Cause Remedy NAV Interface Data Page shows ARINC In A and B Bus 2 lines Check wiring valid data is not being Received...
  • Page 842 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (d) Verify that the Configuration Data page displays the correct installation location (primary or secondary). (e) Remove power from the ND to terminate Test Mode. Re-apply power to the ND and start the display in Mission Operational Mode.
  • Page 843 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 5 NAVIGATION DISPLAY (ND) DEFAULT SETTINGS (MEGGITT) Screen Format Element Setting VOR1 RMI1 RMI2 RANGE 2.5NM GPS SEL GPS1 APORTS Disabled NAVAIDS Disabled WPTS Disabled Disabled Selected Heading Last Known Setting...
  • Page 844 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (s) Press the EADI Display Down switch to select EADI Display Down mode and verify that the ND displays the PFD (i.e. - EADI) screen format. Verify that the PFD screen blanks.
  • Page 845 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Air Data & Attitude Heading Reference System (ADAHRS) [i.e. - Attitude Heading Reference System (AHRS)]. The ADAHRS unit is located on the aft equipment shelf behind the cabin rear closeout panel.
  • Page 846 The Instructions for Continued Airworthiness (ICA) published by Avidyne provide the necessary information for maintaining this system as installed in Piper airplanes, except as noted below. NOTE: The Avidyne ICA documents cited below are included in Avantext’s Piper Tech Pubs CDs/DVDs or are available from Avidyne.
  • Page 847 PFD. For the Piper installation, however, there is only a single alignment pin on the top of the PFD engaging a slot in the upper rear cross bracket. (See Figure 3, Sheet 1.) (d) In para 7.5.1, apply power by turning the Battery Master Switch ON or by applying...
  • Page 848 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (g) If using para 7.6, add the following: Verify that the Avionics Page Display indicates: Aircraft Make: Piper Model: PA34-220T Sensor Suite: GPS 1: GARMIN 430/530 on ARINC 1 GPS 2:...
  • Page 849 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL PRIMARY FLIGHT DISPLAY MULTI-FUNCTION DISPLAY Effectivity Avidyne Entegra Installation Seneca V Figure 1 with Avidyne Option 34-20-00 PAGE 17 5D17 Feb 28/09...
  • Page 850 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Seneca V Avidyne Entegra Wiring Installation with Avidyne Option Figure 2 PAGE 18 34-20-00 May 30/07 5D18...
  • Page 851 NOTE: Whenever the MFD is replaced, calibrate the Fuel Quantity Indicator as described under Seneca V - Avidyne Fuel Quantity Calibration in 28-40-00. (a) In para 2, items 7 and 8 are standard in the Piper installation. (b) Replace items 3 and 4 in paragraph 7.3.1, Maintenance Mode Access with the following: At the prompt “Press any bezel key to continue”, press any LSK.
  • Page 852 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Replace paragraph 7.3.10.1, Engine Sensor Setup, with the following: From the Maintenance Page, depress the LSK (L4) to access the Traffic Setup page. Using the right outer concentric know to select the configuration field and the right inner concentric knob to select the desired configuration.
  • Page 853 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Data Acquisition Unit (DAU) NOTE: Whenever the DAU is replaced, calibrate the Fuel Quantity Indicator as described under Seneca V - Avidyne Fuel Quantity Calibration in 28-40-00. (a) Use 200-00041-000 DAU ICA, Avidyne Document No. AVSIU-011, with the following exceptions: In para 6, in “Table 2 - DAU Pinout,”...
  • Page 854 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL ENSURE ARROW POINTS FWD COVER ASSY, MAGNETOMETER OAT PROBE (NOT USED) W.S. W.S. 82.92 69.24 Effectivity Seneca V Magnetometer / OAT Installation with Avidyne Option Figure 3 PAGE 22 34-20-00...
  • Page 855 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Magnetic Heading Systems Flux Detector (See Figure 4.) A flux detector installed in the wing tip of the left wing is used to provide heading data to the HSI/EHSI and, if installed, the ADAHRS.
  • Page 856 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL W.S. FLUX DETECTOR HARNESS 221.49 (REF) BRASS SCREW VIEW A BRASS SCREW BRASS WASHER BRASS NUT BRACKET ASSY FLUX DETECTOR BRASS SCREW DOUBLER PLATE LOOKING INBOARD Flux Detector Installation Figure 4...
  • Page 857 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Magnetic Heading Compensation / Calibration WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION SUPPLEMENTARY PUBLICATIONS.) (1) Standard Installation (S/N’s 3449001 thru 3449151 only )
  • Page 858 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 7 DEVIATION CHART Approx. Magnetic Actual Magnetic Heading Card Heading Heading Reading Deviation North East South West ST-180 Deviation Graphs Figure 5 PAGE 24B 34-20-00 Feb 28/09 5D26...
  • Page 859 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL If the pattern is not centered around zero, rotate the flux sensor clockwise to correct for minus deviations or counterclockwise for plus deviations. Plot final deviations on the final deviation graph in Figure 5.
  • Page 860 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL When satisfied that errors in excess of 10° is fault of the instrument, replace instrument. After installing new instrument, repeat setup After all adjustments are completed, the indicator shall read within ± 2° of any compass rose heading on which the aircraft is placed.
  • Page 861 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Place the ADAHRS test cable calibration switch in the "CAL" (closed) position. Insure that the heading system flag comes into view on the EADI, replacing the heading scale tape and the digital readout.
  • Page 862 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL With the ADAHRS test cable installed, and the calibration switch in the "CALIBRATE" (closed) position, slowly taxi the aircraft in two (2) complete 360- degree turns. The direction of the turn does not matter; however, a minimum time of one (1) minute for each 360-degree turn (two (2) minutes minimum for the full 720 degrees) is required for the calibration process.
  • Page 863 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (5) Optional Avidyne EFIS Installation See Electronic Flight Instrument System (EFIS) - Avidyne Option, Maintenance, Primary Flight Display above. 34-20-00 PAGE 29 Feb 28/09...
  • Page 864 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Magnetic Compass The magnetic compass is a self-contained instrument. This instrument has an individual light which is connected to the instrument lighting circuit. The compass correction card is located in the card holder mounted on the instrument.
  • Page 865 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 10 TROUBLESHOOTING MAGNETIC COMPASS Trouble Cause Remedy Excessive card error. Compass not properly Compensate instrument. compensated. External magnetic Locate magnetic interference. interference and eliminate if possible. Excessive card oscillation.
  • Page 866 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Turn Coordinator Unlike the conventional turn and slip indicator, the electrically operated gyroscope in the turn coordinator is canted. However, like conventional turn and slip indicator, it works on the principal of precession. By canting the gyro, the instrument not only measures rate of turn, but also measures rate of roll.

  • Page 867: Wiring Diagram

    SPEC CONTROL DWG SPECIFICATION TREAT GROUP TYPE GROUP THIS DRAWING IS THE PROPERTY OF THE NEW PIPER AIRCRAFT, INC. AND ITS T TAYLOR 5/28/02 INSTL, ASSY, SUB ASSY, OR KIT REVISION DRAFTSMAN POSSESSION BY UNAUTHORIZED PERSONS SHALL NOT BE CONSTRUED AS...
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  • Page 871: Dependent Position Determining

    COM/NAV/GPS (S/N’s 3449269 and up.) WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Description Garmin GNS-430/530 (or in later models 430W) COM/NAV/GPS systems are installed as standard equipment.
  • Page 872 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL To change data on the displayed Configuration Page, the cursor must be selected. Press the inner concentric knob on the right side of the unit to activate the cursor. Rotating the outer concentric knob on the right side of the unit changes the selected data field.
  • Page 873 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (b) MAIN RS232 CONFIG Deselect the cursor and rotate the inner concentric knob on the right side of the unit to display the MAIN RS232 CONFIG page. Configure GNS #1 and #2 as follows: NOTE: Channels 5 and 6 (not shown) are always “OFF”;...
  • Page 874 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (e) MAIN LIGHTING Deselect the cursor and rotate the inner concentric knob on the right side of the unit to display the MAIN LIGHTING page. MAIN LIGHTING DISPLAY LIGHTING NO SETTING...
  • Page 875 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (k) VOR/LOC/GS Ramp Checks Once the GNS units have been configured, proper navigation receiver and indicator operation (VOR/LOC/GS) should be verified using the IFR NAV-401L ramp test set or equivalent. This procedure assumes familiarity with proper operation of the test equipment and is not intended to be a tutorial on test set use.
  • Page 876 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 4B 34-50-00 Feb 28/09 5E16B...
  • Page 877 MAINTENANCE MANUAL Transponder (S/N’s 3449301 and WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Description. A Garmin GTX-330 Transponder is installed as standard equipment. Maintenance of the GTX-330 is “on condition”...
  • Page 878 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 9 VOICE AND VOLUME (TIS Installation Only - No Other Traffic System Installed.) Function Selection Description VOLUME VOICE MALE MESSAGE (0-5) Selected Audio Tones and Messages 0= Toggle a continuous tone on and off 1= Attention Tone, precedes voice messages to attract the pilot’s attention.
  • Page 879 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 11 ARINC 429 CONFIGURATION PAGE - WITH MECHANICAL INDICATORS GTX 330 429 INPUT SPEED DATA CHANNEL 1 HIGH GPS/FMS CHANNEL 2 HIGH CHANNEL 3 CHANNEL 4 429 OUTPUT DATA...
  • Page 880 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 14 CHART 15 RS-232 INPUT AND OUTPUT OPERATION CONFIGURATION RS-232 CONFIG Page VS RATE FORMAT FEET 232 INPUT INPUT OUTPUT VFR ID 1200 CHANNEL 1 ALTITUDE ALERT DEVIATION SQUAT SWITCH “YES”...
  • Page 881 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (4) MODE S Address (ICAO Aircraft Address Code) and FLIGHT ID Entry Page When the unit is turned on for the first time, or an invalid address is recognized, the unit will prompt the user to enter a valid aircraft address.
  • Page 882 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Mode S Transponder Ground Tests (PIR-PPS60207, Rev. D.) These tests enable compliance with FAR 91.413 and FAR Part 43 Appendixes E and F. Perform these tests in conjunction with Post Installation Set-up, above.
  • Page 883 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL ATCRBS Only All-Call (ATC 601 Test 5): Test Set interrogates UUT with ATCRBS Only All-Call (0.8 microsecond P4 pulse) and verifies that Mode S transponders do not reply. Test set results are as follows:...
  • Page 884 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Invalid Address: Mode S Address (ATC 601 Test 7): Test Set interrogates UUT with Mode S interrogations using correct address and two incorrect addresses (nominal rate of 50 interrogations per second). These addresses are different from the address determined from Mode S All-Call.
  • Page 885 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Mode S UF4 (ATC 601 Test 10) Test Set interrogates UUT with Mode S UF4 and verifies reply has correct altitude (compared to ATCRBS Mode C), correct address (compared to DF11) and correct format.
  • Page 886 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 10 Mode S UF16 (ATC 601 Test 13) Test Set interrogates UUT with UF16 and verifies that reply has correct altitude (compared to ATCRBS Mode C), correct address (compared to DF11) and correct format.
  • Page 887 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 12 Mode S UF21 (ATC 601 Test 15) Test Set interrogates UUT with Mode S UF21 and verifies that reply (if received) has correct ID code (compared to ATCRBS Mode A), correct address (compared to DF11) and correct format.
  • Page 888 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 15 MTL Difference (Receiver Sensitivity) (ATC 601 Test 19) Test Set verifies that receiver sensitivity difference between Mode A and Mode C is < 1.0 dB. ** MTL DIFFERENCE TEST - PASSED ** MODA A MTL - MODE C MTL = 0.2dB...
  • Page 889 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL 17 Accuracy Test Setup Apply power to the Altitude Reporter and the ATC Transponder Test Set. Allow a minimum of 15 minutes of warm up time. The Transponder Test Set reading should match flight altimeter reading, not static pressure system tester.
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  • Page 893: Ground Test Procedure

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL APPENDIX GROUND TEST PROCEDURE MEGGITT MAGIC AIR DATA & HEADING REFERENCE SYSTEM (ADAHRS) PITOT-STATIC SYSTEM...
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  • Page 895 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL APPENDIX 1 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE APP1 - List of Feb 28/09 Effective Pages May 30/07 APP1 May 30/07 May 30/07 May 30/07...
  • Page 896 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 APPENDIX 1 - LOE May 30/07...
  • Page 897 Ground Test Proceedure - Meggitt MAGIC ADAHRS and Pitot-Static System (PIR-Meggitt/S-TEC Doc. No. 97-9001-001, Rev. 3.)
  • Page 921 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK APPENDIX 1 PAGE 25 May 30/07...
  • Page 922 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GRIDS 5H6 THRU 6B24 INTENTIONALLY BLANK PAGE 26 APPENDIX 1 Feb 28/09...
  • Page 923 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER OXYGEN...
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  • Page 925 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 35 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 35-List of Feb 28/09 Effective Pages May 30/07 35-Table of Contents Feb 28/09 May 30/07 35-10-00...

  • Page 926: List Of Effective Pages

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 35 - LIST OF EFFECTIVE PAGES May 30/07...
  • Page 927 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 35 - OXYGEN TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. CREW/PASSENGER SYSTEMS 35-10-00 Description and Operation Troubleshooting Precautions Inspection and Maintenance Swagelock Fitting Installation 6C14 Teflon Tape Thread Sealant...
  • Page 928 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 35 - CONTENTS May 30/07...
  • Page 929 CLOTHING, TOOLS, AND IMMEDIATE AREA ARE FREE OF GREASE. A fixed oxygen system is available. The major components for the fixed oxygen system are manufactured by Scott Aviation. Accordingly, contact Scott Aviation, as well as your Piper Dealer, for any required information not covered herein.
  • Page 930 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Fixed Oxygen System Installation Figure 1 CHART 1 TROUBLESHOOTING OXYGEN SYSTEM Trouble Cause Remedy No indication of pressure Cylinder empty or leak in Purge, charge, and check on pressure gauge.
  • Page 931 MAINTENANCE MANUAL Precautions WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) CAUTION: DO NOT ATTEMPT TO TIGHTEN ANY CONNECTIONS WHILE THE SYSTEM IS CHARGED.
  • Page 932 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL System Flow Check (PIR-PPS60087, Rev. R.) An operational check of the regulator can be accomplished as follows: (Refer to Figures 1 and 2.) (1) Using the test pressure gauge (or equivilent) shown in Figure 2, connect the apparatus to the pilot's outlet in the overhead panel.
  • Page 933 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Oxygen System Test Apparatus Figure 2 Oxygen Lines Clearance Check (PIR-PPS60087, Rev. R.) Make sure to check the oxygen lines for proper clearance as follows: (Refer to Figure 3.) (1) Two inch minimum between oxygen tubes and all flexible moving parts of the aircraft (flexible control cables, etc.).
  • Page 934 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Oxygen Tubing Installation Figure 3 PAGE 6 35-10-00 May 30/07 6C12...
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  • Page 936 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Swageloc Fitting Installation (See Figure 4.) NOTE: The high pressure line fitting at the regulator should be tightened until it bottoms. Make sure to use teflon tape on all male pipe threads.
  • Page 937 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Swageloc Fitting Installation Figure 4 35-10-00 PAGE 9 6C15 May 30/07...
  • Page 938 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Leak Test (PIR-PPS60087, Rev. R.) Leak-Tec Formula #16-OX (available from Scott Aviation) is recommended for leak testing. Refer to the List of Consumable Materials. Remove the royalite covers in the baggage compartment and, with oxygen system turned off, disconnect the low pressure supply line and connect it to a regulated cylinder charged with dry nitrogen.
  • Page 939 FAA, Piper, or Scott Aviation. NOTE: On Seneca IV models, replacement time for the recharge valve is every 5 years. If the cylinder is being removed for the 5 year test, it is recommended the valve be removed and/or replaced at the same time.
  • Page 940 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Oxygen Cylinder and Regulator Valve Seneca IV Figure 5 Effectivity Oxygen Cylinder and Regulator Valve Seneca V Figure 6 (Sheet 1 of 2) PAGE 12 35-10-00 May 30/07 6C18...
  • Page 941 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Oxygen Cylinder (Refer to Figures 5 and 6.) The fixed oxygen system cylinder is installed in the left side of the nose section aft of the closeout panel at station 31.04.
  • Page 942 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Oxygen Cylinder and Regulator Valve Seneca V Figure 6 (Sheet 2 of 2) PAGE 14 35-10-00 May 30/07 6C20...
  • Page 943 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Pressure Gauge The oxygen pressure gauge and ON-OFF control knob are installed in the bottom center of the pilot’s instrument panel below, and slightly right of, the control wheel. Access to either one is obtained from beneath the instrument panel.
  • Page 944 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Oxygen System Fill Valve Installation Figure 7 Fill Valve (See Figure 7.) (1) Removal (a) From inside of of forward baggage compartment: Remove hydraulic reservoir cover located in rear top center of compartment by removing four attachment screws.
  • Page 945 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) Installation NOTE: Apply teflon tape to all tapered male threads as cautioned on page 1 of this section. (a) Insert valve assembly into mounting bracket. (b) Align screw holes in valve mounting plate with those in mounting bracket.
  • Page 946 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Oxygen On/Off Control The oxygen ON-OFF control knob is installed in the bottom center of the pilot’s instrument panel below, and slightly right of, the control wheel. Access is obtained from beneath the instrument panel.
  • Page 947 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Refilling CAUTION: BEFORE SERVICING THE OXYGEN SYSTEM, MAKE SURE THE AIRCRAFT IS SECURELY GROUNDED ELECTRICALLY. CAUTION: DO NOT OPERATE ELECTRICAL EQUIPMENT WHILE SERVICING OXYGEN SYSTEM. CAUTION: DO NOT ATTEMPT TO TIGHTEN ANY CONNECTIONS WHILE THE SYSTEM IS CHARGED.
  • Page 948 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) When using a recharge unit consisting of two or more supply cylinders (cascade storage system), it is recommended that the following procedure be used: (a) Before opening any valves, check the pressure remaining in the airplane's oxygen cylinder.
  • Page 949 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 35-10-00 PAGE 21 May 30/07...
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  • Page 951 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER VACUUM...
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  • Page 953 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 37 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 37-List of Feb 10/08 Effective Pages May 30/07 37-Table of Contents May 30/07 May 30/07 37-00-00...

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  • Page 955 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 37 - VACUUM TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 37-00-00 6D11 Description and Operation 6D11 Troubleshooting 6D11 DISTRIBUTION 37-10-00 6D21 Hoses and Clamps 6D21 Gyro Filter...
  • Page 956 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 37 - CONTENTS May 30/07 6D10...
  • Page 957 PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL WARNING: FAILURE TO CONSULT APPLICABLE VENDOR PUBLICATION(S), WHEN SERVICING OR INSPECTING VENDOR EQUIPMENT INSTALLED IN PIPER AIRCRAFT, MAY RENDER THE AIRCRAFT UNAIRWORTHY. (SEE INTRODUCTION - SUPPLEMENTARY PUBLICATIONS.) Description and Operation (See Figure 1.) The vacuum system uses two regulators, gyro inlet filters, and a manifold check valve.
  • Page 958 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 1 of 2) TROUBLESHOOTING VACUUM SYSTEM Trouble Cause Remedy No vacuum gauge indication Gyro filter(s) clogged or Clean or replace filter(s). at instrument. dirty. Line(s) from gyro to Check lines.
  • Page 959 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 (Sheet 2 of 2) TROUBLESHOOTING VACUUM SYSTEM Trouble Cause Remedy Vacuum correct but pilot Regulator sticky. Clean regulator. reports pressure erratic or shows complete loss Oil in pump due to leaky Replace pump.
  • Page 960 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Vacuum System Installation Seneca IV Figure 1 (Sheet 1 of 4) PAGE 4 37-00-00 May 30/07 6D14...
  • Page 961 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Vacuum System Installation Effectivity Figure 1 (Sheet 2 of 4) Seneca V 37-00-00 PAGE 5 6D15 May 30/07...
  • Page 962 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Vacuum System Schematic Figure 1 (Sheet 3 of 4) PAGE 6 37-00-00 May 30/07 6D16...
  • Page 963 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Vacuum System Seneca V Figure 1 (Sheet 4 of 4) with Avidyne EFIS 37-00-00 PAGE 7 6D17 May 30/07...
  • Page 964 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 8 37-00-00 May 30/07 6D18...
  • Page 965 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK 37-00-00 PAGE 9 6D19 May 30/07...
  • Page 966 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 10 37-00-00 May 30/07 6D20...
  • Page 967 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL DISTRIBUTION The following information is intended to aid in diagnosing vacuum system service symptoms on those components which are serviced by removal and replacement - I.E. - hoses, clamps, gyro filters, vacuum pumps, and vacuum regulators.
  • Page 968 MAINTENANCE OPERATION ON THE ENGINE. Inspection (See Figure 1.) Aero Accessories Tempest dry air pumps are factory installed in S/N’s 3449273 and up; and available for service replacement in Seneca IV’s and earlier Seneca V’s. If so equipped; for airplanes with frequent de-ice cycles, beginning at 200 hours time-in-service, and each 100 hours thereafter;...
  • Page 969 (1) If required, install fittings on pump per Replacing Pump Fittings, below. CAUTION: ONLY PUMP MOUNTING GASKET AUTHORIZED AND APPROVED FOR USE ON AIRBORNE VACUUM PUMP IS AIRBORNE GASKET B3-1-2, PIPER PART NUMBER 751-859. USE OF ANY OTHER GASKET MAY RESULT IN OIL SEEPAGE OR LEAKAGE AT MOUNTING SURFACE.
  • Page 970 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Replacing Pump Fittings CAUTION: WHEN REPLACING ANY OF THE THREADED FITTINGS, DO NOT USE PIPE DOPE, THREADLUBE, OR TAPE. PIPE DOPE / TAPE PARTICLES INGESTED BY THE VACUUM PUMP COULD CAUSE THE PUMP TO FAIL. USE ONLY SILICONE SPRAY, LETTING IT DRY BEFORE ASSEMBLY.
  • Page 971 (3) With appropriate engine running at medium rpm, the suction gauge should indicate 5.0 inches of mercury ± 0.2 inches of mercury (Seneca IV); or within the normal operating range as marked on the vacuum gauge (Seneca V). If the pressure reading fails to fall within this range, shut down the engine and adjust the regulator valve by moving the valve adjustment screw clockwise to increase pressure, and counterclockwise to decrease pressure.
  • Page 972 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 6 37-10-00 May 30/07...
  • Page 973 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL INDICATING The following information is intended to aid in diagnosing vacuum system service symptoms on those components which are serviced by removal and replacement - I.E. - vacuum gauges and switches.
  • Page 974 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Vacuum Switches (See 37-00-00, Figure 1.) A vacuum switch is located on each vacuum regulator at the rear of each firewall. Each activates its associated VACUUM INOP annunciator light when the suction from the associated pump drops below 4 ±...
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  • Page 977 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER ELECTRICAL / ELECTRONIC PANELS...
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  • Page 979 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 39 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 39-List of Feb 10/08 Effective Pages May 30/07 39-Table of Contents Feb 10/08 May 30/07 39-10-00...

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  • Page 981 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 39 - ELECTRICAL / ELECTRONIC PANELS TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. INSTRUMENT & CONTROL PANELS 39-10-00 6E13 General 6E13 Face-Mounted Instruments 6E13 Removal 6E13 Installation 6E13...
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  • Page 983: Instrument And Control Panels

    PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL INSTRUMENT AND CONTROL PANELS General Face-Mounted Instruments Most instruments are face-mounted and secured to the instrument panel by screws from the front of the panel. Most instruments are removed out the back of the panel, but a few are removed through the front of the panel.
  • Page 984 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (2) Installation (PIR-PPS 60237, Rev New) NOTE: Inspect the front of the panel-mounted avionics tray/rack to verify it is not significantly inset from the panel. If so, correct the tray/rack installation before proceeding.
  • Page 985 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Switches All switches are rocker-type and are located centrally in the instrument panel, and, in the Seneca V, in the overhead switch panel. CAUTION: ALTHOUGH SMALL SWITCH ASSEMBLIES ARE EASIER TO REMOVE IF WIRING IS FIRST DISCONNECTED, THE LIMITED WORK SPACE BEHIND THE PANEL CAN RESULT IN BURNED WIRE INSULATION.
  • Page 986 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 4 39-10-00 May 30/07 6E16...
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  • Page 989 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL ELECTRICAL AND ELECTRONIC EQUIPMENT The following illustrations provide electrical and electronic equipment component locating information. INDEX Seneca IV - Figure 1 Seneca V - Figure 2 Component Sheet No. Component Sheet No.
  • Page 990 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 2 39-20-00 May 30/07 6E20...
  • Page 991 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Component Locator - Seneca IV Effectivity Figure 1 (Sheet 1 of 5) Seneca IV 39-20-00 PAGE 3 6E21 May 30/07...
  • Page 992 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Component Locator - Seneca IV Seneca IV Figure 1 (Sheet 2 of 5) PAGE 4 39-20-00 May 30/07 6E22...
  • Page 993 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Component Locator - Seneca IV Effectivity Figure 1 (Sheet 3 of 5) Seneca IV 39-20-00 PAGE 5 6E23 May 30/07...
  • Page 994 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Component Locator - Seneca IV Seneca IV Figure 1 (Sheet 4 of 5) PAGE 6 39-20-00 May 30/07 6E24...
  • Page 995 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Component Locator - Seneca IV Effectivity Figure 1 (Sheet 5 of 5) Seneca IV 39-20-00 PAGE 7 May 30/07...
  • Page 996 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL THIS PAGE INTENTIONALLY BLANK PAGE 8 39-20-00 May 30/07...
  • Page 997 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL VIEW I - I VIEW LOOKING DOWN Component Locator - Seneca V Effectivity Figure 2 (Sheet 1 of 8) Seneca V 39-20-00 PAGE 9 Feb 10/08...
  • Page 998 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Component Locator - Seneca V Seneca V Figure 2 (Sheet 2 of 8) PAGE 10 39-20-00 Feb 10/08...
  • Page 999 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Component Locator - Seneca IV Effectivity Figure 2 (Sheet 3 of 8) Seneca V 39-20-00 PAGE 11 Feb 10/08...
  • Page 1000 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Component Locator - Seneca V Seneca V Figure 2 (Sheet 4 of 8) PAGE 12 39-20-00 Feb 10/08...
  • Page 1001 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Component Locator - Seneca V Effectivity Figure 2 (Sheet 5 of 8) Seneca V 39-20-00 PAGE 13 Feb 10/08...
  • Page 1002 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Effectivity Component Locator - Seneca V Seneca V Figure 2 (Sheet 6 of 8) PAGE 14 39-20-00 Feb 10/08...
  • Page 1003 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL PANEL LTS. DIMMER 101816 H SH.4 P313 47.45 FUSELAGE FRAME STA. 49.50 P314 LEFT SIDE SWITCH LTS DIMMER VIEW H-H SWITCH, PANEL LTS. DIMMERS ANNUNCIATOR DIMMER (P308) VIEW I - I RH WING SPAR LOOKING AFT...
  • Page 1004 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL B.L. 101816 H SHEET 4 0.00 (P312) AVIONICS LIGHT DIMMER FRAME ASSY. STA. 49.50 S-TEC A/P PRESSURE TRANSDUCER COVER ASSY. LH FS 49.50 VIEW G - G LOOKING FORWARD Effectivity...
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  • Page 1007 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER STRUCTURES...
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  • Page 1009 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 51 LIST OF EFFECTIVE PAGES CHAPTER CHAPTER SECTION PAGE DATE SECTION PAGE DATE 51-List of Feb 10/08 Effective Pages May 30/07 51-Table of Contents May 30/07 May 30/07 51-00-00...

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  • Page 1011 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHAPTER 51 - STRUCTURES TABLE OF CONTENTS SUBJECT SECTION PAGE GRID NO. GENERAL 51-00-00 Description INVESTIGATION, CLEANUP AND AERODYNAMIC SMOOTHNESS 51-10-00 6G11 Corrosion Control 6G11 Forms of Corrosion 6G11 Conditions Affecting Corrosion...
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  • Page 1013 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL GENERAL The PA-34-220T is an all metal semi-monocoque structure with a fuselage constructed of bulkheads, stringers and stiffeners, to which all of the outer skin is riveted. Windows include a single pane windshield and eight side windows;...
  • Page 1014 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Skin Materials and Thickness Figure 1 (Sheet 1 of 2) PAGE 2 51-00-00 May 30/07...
  • Page 1015 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Skin Materials and Thickness Figure 1 (Sheet 2 of 2) 51-00-00 PAGE 3 May 30/07...
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  • Page 1017 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL INVESTIGATION, CLEANUP AND AERODYNAMIC SMOOTHNESS Corrosion Control Corrosion is the deterioration of metal by chemical or electrochemical attack. Water which is allowed to remain on the aircraft and industrial pollution are the major causes of corrosion in aircraft. The two general types of corrosion are: -- Direct chemical attack.
  • Page 1018 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL CHART 1 TYPES OF METAL CORROSION Remedy (2) Type of Material Type of Corrosion Rust (1) . Steel. Complete removal of corrosion by mechanical means. Aluminum. White to grey powdery material.
  • Page 1019 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (3) Inspections for corrosion should be performed by personnel familiar with corrosive problems and their remedies. (a) Daily and preflight inspections should include the engine frontal areas, all intake vents,...
  • Page 1020 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL Corrosion Prone Areas Certain areas are more prone to corrosion than others. The following list is intended to be a general guide to areas where corrosion is frequently found. (1) Areas around steel fasteners are susceptible to corrosion. The paint on these areas cracks which allows moisture to seep in and corrode the underlying metal.
  • Page 1021 PIPER AIRCRAFT, INC. PA-34-220T, SENECA IV / V MAINTENANCE MANUAL (14) Skin joints and lap-overs are two areas which may contain moisture. Corrosion in these areas may go unnoticed unless particular attention is paid to them during inspection. (15) Hoses having an internal wire braid which are located in a position where they are frequently water soaked need a protective treatment.
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