Textron Bell 206A Series Maintenance Manual
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Textron Bell 206A Series Maintenance Manual

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The instructions set forth in this manual, as supplemented or modified by Alert Service Bulletins (ASB) or
other directions issued by Bell Helicopter Textron Inc. and Airworthiness Directives (AD) issued by the
applicable regulatory agencies, shall be strictly followed. This manual covers 206A, 206B, and 206B3
helicopters SN 4 through and including current production. TH-57/TH-67 helicopters are covered along
with the use of manual supplements. 206B1 helicopters are not covered by this manual.
COPYRIGHT NOTICE
COPYRIGHT
201
BELL ® HELICOPTER TEXTRON INC.
AND BELL HELICOPTER TEXTRON
CANADA LTD.
ALL RIGHTS RESERVED
Export Classification C, ECCN EAR99
MAINTENANCE MANUAL
VOLUME 1
GENERAL INFORMATION
FOR MODELS 206A, 206B, AND 206B3 HELICOPTERS
BHT-206A/B-SERIES-MM-1
NOTICE
REVISION 16 — 25 JUNE 2019
7 JANUARY 1998

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Summary of Contents for Textron Bell 206A Series

  • Page 1: General Information

    The instructions set forth in this manual, as supplemented or modified by Alert Service Bulletins (ASB) or other directions issued by Bell Helicopter Textron Inc. and Airworthiness Directives (AD) issued by the applicable regulatory agencies, shall be strictly followed. This manual covers 206A, 206B, and 206B3 helicopters SN 4 through and including current production.
  • Page 2 BHT-206A/B-SERIES-MM-1 PROPRIETARY RIGHTS NOTICE These data are proprietary to Bell Helicopter Textron Inc. Disclosure, reproduction, or use of these data for any purpose other than helicopter operation or maintenance is forbidden without prior written authorization from Bell Helicopter Textron Inc.
  • Page 3 BHT-206A/B-SERIES-MM-1 WARNING THIS MANUAL APPLIES ONLY TO HELICOPTERS AND COMPONENTS MAINTAINED IN ACCORDANCE WITH BELL HELICOPTER TEXTRON (BELL) APPROVED PROCEDURES USING BELL APPROVED PARTS. ALL INSPECTION, REPAIR AND OVERHAUL PROCEDURES PUBLISHED BY BELL, INCLUDING PART RETIREMENT LIFE, ARE BASED SOLELY ON THE USE OF BELL PARTS THAT HAVE BEEN MAINTAINED USING BELL APPROVED DATA.
  • Page 4 BHT-206A/B-SERIES-MM-1 CUSTOMER SUPPORT AND SERVICES Flying smart means that no matter where you are, or what time it is, you can make a call and get additional information, clarification, or advice on a technical or operational issue concerning your helicopter or information contained in our Technical Publications. Product Support Engineering (PSE) is just a phone call away and may be contacted as follows: Model 206, 407, or 505...

  • Page 5: Log Of Revisions

    BHT-206A/B-SERIES-MM-1 LOG OF REVISIONS Insert latest revision pages and dispose of superseded ones. On a revised page, the text and/or illustration affected by the latest revision is shown by a vertical line. A revised page with only a vertical line next to the page number indicates that text has shifted or that non-technical correction(s) were made on that page.
  • Page 6 BHT-206A/B-SERIES-MM-1 LOG OF PAGES (CONT) Page No. Rev No. Page No. Rev No. Page No. Rev No. 24 – 32 ....3 37 –...
  • Page 7 BHT-206A/B-SERIES-MM-1 LOG OF PAGES (CONT) Page No. Rev No. Page No. Rev No. Page No. Rev No. 29 – 30 ....8 58 .
  • Page 8 BHT-206A/B-SERIES-MM-1 LOG OF PAGES (CONT) Page No. Rev No. Page No. Rev No. Page No. Rev No. 28 ..... . 11 31 –...
  • Page 9 BHT-206A/B-SERIES-MM-1 LOG OF PAGES (CONT) Page No. Rev No. Page No. Rev No. Page No. Rev No. VOLUME 11 VOLUME 13 3 – 4 ..... 0 Cover .
  • Page 11 CUSTOMER FEEDBACK RETURN VIA FAX TO PRODUCT SUPPORT ENGINEERING (450) 433-0272 Manual Title: ___________________________________________________________ Manual Number (if assigned): _____________________________________________ Date of Issue: ___________________________________________________________ Date of Last Revision: ___________________________________________________ Section, Chapter, Paragraph Affected: ______________________________________ Your Feedback: ________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ Now Reads: ____________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________...
  • Page 12 TAPE HERE POSTAGE NECESSARY Product Support Engineering 12,800 rue de l’Avenir Mirabel, Québec, Canada, J7J 1R4 FOLD ON DOTTED LINES AND TAPE Export Classification C, ECCN EAR99 TAPE HERE...
  • Page 13 Please complete this form and return by mail, e-mail (publications@b .com), or fax (817-280-6466, Attention: CPDC). This will ensure that the new owners/operators receive updates to their Bell Helicopter Textron Technical Manuals and Bulletins. Model of Helicopter Sold or Purchased ___________________________________________ Serial and Registration Number _________________________________________________...
  • Page 14 From NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES BUSINESS REPLY MAIL FIRST CLASS PERMIT NO. 1744 FORT WORTH, TEXAS COMMERCIAL PUBLICATION DISTRIBUTION CENTER P.O. BOX 482 FORT WORTH, TEXAS 76101-0482 FOLD ON DOTTED LINES AND TAPE Export Classification C, ECCN EAR99 TAPE HERE...
  • Page 15 BHT-206A/B-SERIES-MM-1 SPARE PARTS WARRANTY ONE YEAR/1,000 HOURS PRORATED WARRANTY AND REMEDY: Seller warrants each new helicopter part or helicopter part reconditioned by seller to be free from defect in material and workmanship under normal use and service and if installed on Bell model helicopters. Seller’s sole obligation under this warranty is limited to replacement or repair of parts which are determined to Seller’s reasonable satisfaction to have been defective with 1,000 hours of operation or one (1) year after installation, whichever occurs first and reimbursement of reasonable freight charges.
  • Page 17 TC APPROVED BHT-206A/B-SERIES-MM-1 CHAPTER 4 — AIRWORTHINESS LIMITATIONS SCHEDULE TABLE OF CONTENTS Paragraph Chapter/Section Page Number Title Number Number AIRWORTHINESS LIMITATIONS SCHEDULE Airworthiness Limitations Schedule ..........4-00-00 TABLES Table Page Number Title Number Airworthiness Limitations Schedule ..............The Airworthiness Limitations Schedule is approved by the Minister and specifies the maintenance required by any applicable airworthiness or operational rules unless an alternative program has been approved by the Minister.
  • Page 18 BHT-206A/B-SERIES-MM-1 TC APPROVED REVISION NO. DATE OF SIGNATURE TC SIGNATURE Original 7 January 1998 21 May 2002 7 December 2009 8 April 2011 13 October 2011 1 June 2012 7 November 2012 4-00-00 Page 2 Rev. 16 25 JUN 2019 Export Classification C, ECCN EAR99...
  • Page 19 TC APPROVED BHT-206A/B-SERIES-MM-1 REVISION NO. DATE OF SIGNATURE TC SIGNATURE 25 JUNE 2019 4-00-00 25 JUN 2019 Rev. 16 Page 3/4 Export Classification C, ECCN EAR99...
  • Page 21 TC APPROVED BHT-206A/B-SERIES-MM-1 AIRWORTHINESS LIMITATIONS SCHEDULE 4-1. AIRWORTHINESS LIMITATIONS CONSPICUOUS MANNER TO PREVENT CONTINUED USE, EVEN INADVERTENT SCHEDULE USE. W H E N A R E P L A C E M E N T PA R T I S WARNING INSTALLED, THE PART NAME, PART N U M B E R , S E R I A L N U M B E R , A N D...
  • Page 22 BHT-206A/B-SERIES-MM-1 TC APPROVED SURROUNDING THEIR USE MAY CALL Agreement for the helicopter or the component. FOR OPERATION OF THE MILITARY H E L I C O P T E R O U T S I D E O F T H E The airworthiness lives given to the components and A P P R O V E D C O M M E R C I A L F L I G H T assemblies are determined by experience, tests and...
  • Page 23 TC APPROVED BHT-206A/B-SERIES-MM-1 Table 4-1. Airworthiness Limitations Schedule (Cont) COMPONENT AIRWORTHINESS LIFE PART NUMBER MAIN ROTOR HUB AND BLADES (CONT) Strap Retention Fitting 206-010-155-011/-015 1200 hours Latch Bolt 206-010-169-001/-003 Main Rotor Blade 206-010-200-029 Main Rotor Blade 206-010-200-033/-133/-137/ 5000 hours -139/-141/-145/-149/-151/-153 Main Rotor Trunnion 206-011-113-001 2400 hours...
  • Page 24 BHT-206A/B-SERIES-MM-1 TC APPROVED Table 4-1. Airworthiness Limitations Schedule (Cont) COMPONENT AIRWORTHINESS LIFE PART NUMBER SWASHPLATE AND SUPPORT (CONT) Lower Collective Tube 206-001-524-001/-011/-015 4800 hours Servo Actuator Support 206-001-566-001/-101 10,000 hours Servo Actuator Support 206-001-566-105 5000 hours Collective Idler Link 206-010-407-001 4800 hours Collective Idler Link 206-010-446-107...
  • Page 25 TC APPROVED BHT-206A/B-SERIES-MM-1 Table 4-1. Airworthiness Limitations Schedule (Cont) COMPONENT AIRWORTHINESS LIFE PART NUMBER TAIL ROTOR HUB AND BLADES Tail Rotor Blade 206-010-750-003/-005/-007 Tail Rotor Trunnion 206-010-776-001 2400 hours Tail Rotor Yoke 206-010-788-001 1200 hours Tail Rotor Yoke 206-011-802-001 1200 hours Tail Rotor Trunnion 206-011-803-001/-005 2400 hours...
  • Page 26 BHT-206A/B-SERIES-MM-1 TC APPROVED Table 4-1. Airworthiness Limitations Schedule (Cont) COMPONENT AIRWORTHINESS LIFE PART NUMBER MISCELLANEOUS (CONT) Emergency Floats Cylinder 206-073-919-001/-003/-005/-007 10 years Emergency Floats Cylinder 206-073-922-101 10 years Emergency Floats Cylinder 206-073-929-003/-101/-103 10 years Emergency Floats Cylinder 206-073-930-101 10 years Emergency Floats Cylinder 1269556-3/-4 15 years...
  • Page 27 TC APPROVED BHT-206A/B-SERIES-MM-1 Table 4-1. Airworthiness Limitations Schedule (Cont) NOTES (CONT): Strap retention fittings 206-010-155-011/-015 will have been removed from service no later than 1 January 1979. Refer to ASB 206-76-7, dated 13 August 1976 and note Main rotor grip 206-011-132-009, with serial numbers listed below, have a 1200-hour airworthiness life. The serial numbers not listed below have a 4800-hour airworthiness life.
  • Page 28 BHT-206A/B-SERIES-MM-1 TC APPROVED Table 4-1. Airworthiness Limitations Schedule (Cont) NOTES (CONT): Swashplate supports 206-010-452-001/-005/-109 with more than 1500 hours in service are subjected to a visual inspection every 50 hours. The supports may remain in service until a crack is found or until a total of 4800 hours time in service is accumulated.
  • Page 29 Masts 206-010-332-005/-009/-013/-017/-121 are not listed and are conditional. Selected serial numbers of main rotor mast 206-010-332-121 will have been returned to Bell Helicopter Textron for metallurgical evaluation no later than 31 May 1987. Affected masts inspected at BHT and found to be acceptable have a suffix “U”...
  • Page 30 BHT-206A/B-SERIES-MM-1 TC APPROVED Table 4-1. Airworthiness Limitations Schedule (Cont) NOTES (CONT): Usable only on model 206A, S/N 5001 through 5040. These part numbers are reserved for US Army, model TH-57 training helicopters. Cylinder per DOT-3HT and DOT-E7218 specifications. Refer to IL GEN-93-52, dated 21 June 1993. Cylinder per FAA specifications.
  • Page 31 BHT-206A/B-SERIES-MM-1 CHAPTER 5 — INSPECTIONS AND COMPONENT OVERHAUL SCHEDULE TABLE OF CONTENTS Paragraph Chapter/Section Page Number Title Number Number INSPECTIONS AND COMPONENT OVERHAUL SCHEDULE General ..................5-00-00 Items Not Covered and Inspection Responsibility ......5-00-00 Crash Damage................5-00-00 Types of Inspections ..............5-00-00 Definitions ..................
  • Page 32 BHT-206A/B-SERIES-MM-1 TABLE OF CONTENTS (CONT) Paragraph Chapter/Section Page Number Title Number Number 5-42 1500 Hours of Component Operation and Every 50 Hours Thereafter ..................5-00-00 5-43 2250 Hours or 60 Months of Component Operation ...... 5-00-00 5-44 3000 Hours of Component Operation ..........5-00-00 SPECIAL INSPECTIONS 5-45...
  • Page 33 BHT-206A/B-SERIES-MM-1 TABLES Table Page Number Title Number 100-Hour Airframe Progressive Inspection Events ..........300-Hour Airframe Progressive Inspection Events ..........300-Hour Airframe Progressive or 300-Hour Airframe Periodic Inspection Program Prerequisites ..................Special Inspections ..................... Component Overhaul Schedule................5-00-00 30 APR 2013 Rev. 14 Page 3/4 Export Classification C, ECCN EAR99...
  • Page 35 Lead The Fleet (LTF), or any other special programs and the judgement of Bell Helicopter Textron Make sure the Alert Service Bulletins (ASB), the engineers. They are subject to change only by Bell...
  • Page 36 CRASH DAMAGE component overhaul schedule. Because of the many possible combinations that can For the common Bell Helicopter Textron approved result from crash damage, it is not possible to include optional equipment that is integrated into this the specific repair tasks in this category. The...
  • Page 37 The engineering aspects of this change are approved. The program is closely • Periodic inspection — An inspection that is monitored by Bell Helicopter Textron in an repeated at equal time intervals. operational environment with selected operators. •...
  • Page 38 AIRWORTHINESS LIFE (CHAPTER 4). If approval of the inspection and overhaul tolerance is required by the applicable governing aviation authority, The Bell Helicopter Textron approved tolerance for this is the responsibility of the owner/operator. scheduled inspections, special inspections, interim inspections, and overhaul intervals, unless otherwise...
  • Page 39 BHT-206A/B-SERIES-MM-1 Calendar Example (10% or up to a maximum of 6 months calendar time, whichever is less): 12-MONTH NEXT 12-MONTH MAXIMUM ALLOWED INSPECTION CARRIED INSPECTION INSPECTION TOLERANCE OUT ON: DUE ON: DUE ON: June 10, 2010 10% of 12 months = 1.2 months July 12, 2010 July 31, 2011 (within 10% tolerance)
  • Page 41 5-8. AIRFRAME INSPECTION PROGRAM Table 5-1. 100-Hour Airframe Progressive Inspection Events Bell Helicopter Textron (BHT) has developed airframe inspection programs to provide you with the flexibility AIRFRAME EVENT MAINTENANCE to permit maximum helicopter use. Depending on the...
  • Page 42 BHT-206A/B-SERIES-MM-1 • Weekly inspection Table 5-2. 300-Hour Airframe Progressive Inspection Events (Cont) • 12-month inspection AIRFRAME EVENT MAINTENANCE HOURS NUMBER ZONES • 12 months of component operation • 24-month inspection 5 and 6 • 300 hours or 6 months of component operation 7 and 8 9 and 10...
  • Page 43 BHT-206A/B-SERIES-MM-1 • 1500 hours of component operation and every • Weekly inspection 50 hours thereafter • 12-month inspection • 2250 hours or 60 months of component • 12 months of component operation operation • 24-month inspection • 3000 hours of component operation •...
  • Page 44 BHT-206A/B-SERIES-MM-1 • As required by manufacturer 5-15. CHANGING INSPECTION PROGRAM • Weekly inspection You must use either the airframe periodic inspection program or the airframe progressive inspection • 12-month inspection program from the start. You can change between the two programs at any airframe operating time as •...
  • Page 45 BHT-206A/B-SERIES-MM-1 Table 5-3. 300-Hour Airframe Progressive or 300-Hour Airframe Periodic Inspection Program Prerequisites (Cont) ACCEPTABLE NOMENCLATURE PART NUMBER BULLETIN REFERENCE ALTERNATES Main Driveshaft 206-040-015-107 ASB 206-96-76 and Assembly TB 206-06-186 (Grease Lubricated) Rotor Brake Disc 9440904 TB 206-06-186 Freewheel Assembly 206-040-270-117 TB 206-01-175 Oil Cooler Blower...
  • Page 46 BHT-206A/B-SERIES-MM-1 Table 5-3. 300-Hour Airframe Progressive or 300-Hour Airframe Periodic Inspection Program Prerequisites (Cont) ACCEPTABLE NOMENCLATURE PART NUMBER BULLETIN REFERENCE ALTERNATES FACET Scavenge Oil Purolator Kit Number Filter System STC # SH200GL NOTES: Table 5-3 is not to be used as a configuration listing for the installation of components on 206A/B/B3 Series Helicopters.
  • Page 47 BHT-206A/B-SERIES-MM-1 ZONE 2 ZONE 1 ZONE 6 ZONE 3 ZONE 5 ZONE 4 ZONE 9 ZONE 7 ZONE 8 ZONE 10 - Main rotor hub and blade assembly Zone 1 - Tail rotor hub and blade assembly Zone 2 - Forward top deck Zone 3 - Power plant Zone 4...
  • Page 49 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 1 —...
  • Page 50 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER c. Pillow blocks d. Grips e. Pitch horns f. Static stops Examine pitch horn trunnion bearings for evidence of wear, damage, and for security.
  • Page 51 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER ZONE 2 — TAIL ROTOR ASSEMBLY Chapter 11 PLACARDS AND MARKINGS Examine the placards, decals, and markings. Make sure they are readable, correctly applied, and in agreement with the applicable configuration of your helicopter.
  • Page 52 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine the following tail rotor hub and blade assembly attaching components for condition and security: a. Spacer b. Rubber bumper c.
  • Page 53 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine forward deck drains to ensure absence of obstruction. Examine antennas for condition and security. Chapter 67 CONTROLS Examine the following flight control components for signs of interference, corrosion, wear, mechanical damage, and security: a.
  • Page 54 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine swashplate drive assembly for axial, radial, and accumulative wear. Examine idler (drive) link for mechanical damage and corrosion damage. Disconnect idler (drive) link from outer ring. Disconnect boot from swashplate outer ring and lift up temporarily.
  • Page 55 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 63 18. Examine mast for condition. Chapter 62 and 19. Ensure no sealant voids are visible around the swashplate Chapter 63 drive collar set.
  • Page 56 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 63 TRANSMISSION AND PYLON ASSEMBLY Examine the following pylon support components for condition and security: a. Pylon support link assemblies and bearing for damage and deterioration.
  • Page 57 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 96 Perform operational check of all transmission chip detectors. 10. Ensure no sealant voids are visible around deck mounted supports, fittings, and isolation mount.
  • Page 58 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-16. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER GROUND RUN CAUTION G R O U N D R U N O F H E L I C O P T E R T O B E ACCOMPLISHED BY QUALIFIED PERSONNEL ONLY.
  • Page 59 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-17. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 4 —...
  • Page 60 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-17. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 71 Examine engine mount legs for condition and security. Pay particular attention for loose fasteners. On helicopters with clamshell acoustic mounts, pay particular attention for correct sealing and for signs of corrosion on engine leg tubes.
  • Page 61 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-17. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 71 10. Inspect engine chip detectors for accumulated material. Chapter 96 11. Perform operational check of all engine chip detectors. Chapter 76 12.
  • Page 62 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-17. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER e. Lower collective stick full down. f. Position N governor actuator to full DECREASE (extended). g. Verify for clearance between governor stop and lever stop arm.
  • Page 63 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-17. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER ZONE 5 — AFT TOP DECK PLACARDS AND MARKINGS Chapter 11 Examine the placards, decals, and markings. Ensure they are readable, correctly applied, and in agreement with the applicable configuration of your helicopter.
  • Page 64 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-17. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine external scavenge oil filter system (STC) (if installed) for condition and security. DRIVETRAIN Chapter 65 Examine the oil cooler blower impeller for condition and security.
  • Page 65 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-17. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Make sure that helicopter is ready for ground run and that surrounding area is clear. BHT-206A-FM-1, Start the helicopter and conduct ground run at 100% N BHT-206B-FM-1, check for leaks, and ensure all systems are operational, and BHT-206B3-FM-1...
  • Page 67 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-18. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 6 —...
  • Page 68 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-18. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Replace removed, damaged, or worn anti-chafing adhesive tape (C-460) as required. Examine driveshaft cover retaining clips for condition and security.
  • Page 69 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-18. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER TAIL ROTOR GEARBOX Chapter 53 Examine tail rotor gearbox support for condition and security. Pay particular attention for cracks at the gearbox attachment holes.
  • Page 70 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-18. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Verify navigation lights and anti-collision light for operation, condition, and security. Chapter 97 Examine antennas for condition and security. GROUND RUN CAUTION G R O U N D R U N O F H E L I C O P T E R T O B E...
  • Page 71 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-19. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 7 —...
  • Page 72 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-19. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 52 Verify sliding windows for safety and smoothness of sliding. Chapter 21 Examine the ventilation system for condition and security. Verify nose vents for proper operation, absence of obstructions or debris, and open drains.
  • Page 73 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-19. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Verify operation of defog blowers. Verify operation of ENGINE OUT and LOW ROTOR RPM audio and mute switch, if installed. Verify illumination of all caution panel annunciator light segments by depressing test switch, or each individual light segment, as applicable.
  • Page 74 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-19. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 53 Examine the external power door and receptacle for condition and security. Examine battery compartment door, door seal, and attachment for condition and security.
  • Page 75 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-19. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER ZONE 9 — AFT FUSELAGE PLACARDS AND MARKINGS Chapter 11 Examine the placards, decals, and markings. Make sure they are readable, correctly applied, and in agreement with the applicable configuration of your helicopter.
  • Page 76 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-19. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER b. Examine under engine pan for fuel, oil, or water leaks. c. Examine drain lines for condition and security. d.
  • Page 77 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-19. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine all optional equipment installed in the aft fuselage area for condition and security. Verify proper operation of fuel sump drain valve switch. ZONE 10 —...
  • Page 78 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-19. 100-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine skid shoes for condition and security. Examine skid tube saddles for corrosion, damage, and security. Examine ground handling wheel attachment bolts for condition and security.
  • Page 79 BHT-206A/B-SERIES-MM-1 PERIODIC INSPECTION 5-20. 100-HOUR AIRFRAME PERIODIC INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MUCH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ Do this inspection every 100 hours of operation or every 12 calendar months.
  • Page 81 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-21. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 1 —...
  • Page 82 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-21. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER If applicable, reinstall main rotor blade leading edge erosion protection tape. Examine following main rotor assembly components for condition and security: a.
  • Page 83 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-21. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER d. Ensure no sealant voids are visible around shields (up to and including hub assembly 206-011-100-021) or wear sleeve, strap fittings, and grip closure. Recoat with sealant (C-308) as required.
  • Page 84 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-21. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER e. Bonded joints of blade skin mating area for suspected voids or cracks. Pay particular attention in the area of tip block and doublers.
  • Page 85 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-21. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 1 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Shut down the helicopter. 5-00-00 30 APR 2013 Rev. 14 Page 55/56 Export Classification C, ECCN EAR99...
  • Page 87 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-22. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 3 —...
  • Page 88 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-22. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine particle separator, if installed, vortex tubes, ejector tubes, and ejector nozzles for cleanliness, condition, and security. Examine forward deck drains to ensure absence of obstruction.
  • Page 89 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-22. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine swashplate drive assembly for axial, radial, and accumulative wear. Examine idler (drive) link for mechanical damage and corrosion damage. Disconnect idler (drive) link from outer ring. Disconnect boot from swashplate outer ring and lift up temporarily.
  • Page 90 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-22. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER a. Value must be between 15 to 32 pounds (67 to 142 N). If out of limits, adjust to 15 to 32 pounds (67 to 142 N) and check again.
  • Page 91 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-22. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER 11. Examine relief valve and solenoid valve for leaks, condition, and security. Chapter 63 TRANSMISSION AND PYLON ASSEMBLY Examine the following pylon support components for condition and security: a.
  • Page 92 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-22. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 96 Perform operational check of all transmission chip detectors. 10. Ensure no sealant voids are visible around deck mounted supports, fittings, and isolation mount.
  • Page 93 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-22. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 2 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER GROUND RUN CAUTION G R O U N D R U N O F H E L I C O P T E R T O B E ACCOMPLISHED BY QUALIFIED PERSONNEL ONLY.
  • Page 95 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-23. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 4 —...
  • Page 96 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-23. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 71 Examine engine mount legs for condition and security. Pay particular attention for loose fasteners. On helicopters with clamshell acoustic mounts, pay particular attention for correct sealing and for signs of corrosion on engine leg tubes.
  • Page 97 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-23. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 71 10. Inspect engine chip detectors for accumulated material. Chapter 96 11. Perform operational check of all engine chip detectors. Chapter 95 12.
  • Page 98 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-23. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER d. Verify for clearance between governor stop and lever stop arm. e. Lower collective stick full down. f. Position N governor actuator to full DECREASE (extended).
  • Page 99 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-23. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 28 NOTE Rolls-Royce 250 When purging airframe fuel filter and the engine fuel Series Operation and system of air, ensure that both fuel boost pumps are Maintenance Manual ON and motor engine for approximately 15 seconds 5W2 or 10W2...
  • Page 100 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-23. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER STARTER GENERATOR Chapter 71 Remove starter generator. Examine mounting pad and clamp for condition. Chapter 96 Examine commutator for wear. Replace starter generator if not smooth and bright or if showing excessive wear.
  • Page 101 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-23. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 3 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Verify illumination of airframe fuel filter caution light by depressing differential switch “press to test” button on filter head. GROUND RUN CAUTION G R O U N D R U N O F H E L I C O P T E R T O B E...
  • Page 103 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-24. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 5 —...
  • Page 104 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-24. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine oil cooler core for obstructions and cleanliness. Chapter 65 Examine oil cooler blower and housing for cleanliness, condition, and security. Chapter 79 Examine oil tank for leakage, condition, and security.
  • Page 105 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-24. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 12 Lubricate aft short shaft (aluminum) splined adapter. Chapter 65 Torque check disc pack coupling fasteners 50 to 70 inch-pounds (5.7 to 7.9 Nm).
  • Page 106 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-24. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine driveshaft cover clips for condition and security. Inspect all clip edges for integrity of sealant. Reseal as required. Chapter 53 Examine horizontal stabilizer for condition and security of attachment.
  • Page 107 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-24. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER TAIL ROTOR GEARBOX Chapter 53 Examine tail rotor gearbox support for condition and security. Pay particular attention for cracks at the gearbox attachment holes.
  • Page 108 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-24. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 4 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 96 ELECTRICAL Examine all electrical components, wires, cables, and connectors in the area of the tailboom and vertical fin for chafing, general condition, and security.
  • Page 109 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-25. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 5 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 7 —...
  • Page 110 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-25. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 5 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER AIRFRAME Chapter 25 CAUTION EXERCISE CARE AND USE ADEQUATE SCREW LE N G T H W H E N R E IN S TA L L IN G V E RT IC A L TUNNEL COVER TO AVOID CONTACT WITH TAIL ROTOR CONTROL TUBE.
  • Page 111 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-25. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 5 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER CAUTION EXERCISE CARE AND USE ADEQUATE SCREW LE N G T H W H E N R E IN S TA L L IN G V E RT IC A L TUNNEL COVER TO AVOID CONTACT WITH TAIL ROTOR CONTROL TUBE.
  • Page 112 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-25. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 5 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER EQUIPMENT AND FURNISHINGS Chapter 53 Examine the cabin floor for condition. Chapter 25 Examine the seat assemblies for condition and security. IL GEN-05-103 Examine passenger and crew restraints and webbing for condition and security.
  • Page 113 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-25. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 5 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 96 ELECTRICAL Verify operation of cockpit map reading light. Verify operation of aft cabin reading lights, if installed. CAUTION USE EXTREME CARE WHEN IN PROXIMITY OF PITOT TUBE WITH HEAT APPLIED.
  • Page 114 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-25. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 5 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER b. Seals c. Latches for proper adjustment, positive locking, and wear d. Windows e. Handles BHT-206-SI-68 Examine removable litter door post for condition and security, if installed.
  • Page 115 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-25. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 5 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Remove battery and recondition in accordance with BHT-ALL-SPM and manufacturer’s service manual. Examine battery vent tubes for obstruction or damage. Perform operational check of the battery temperature sensing system.
  • Page 117 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-26. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 6 INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ZONE 9 —...
  • Page 118 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-26. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 6 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 53 Examine baggage compartment door, seal, and latches for operation, condition, and security. Chapter 96 Verify operation of the baggage door ajar caution light, if installed.
  • Page 119 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-26. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 6 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Remove fuel shutoff valve access panel. a. Examine structure for cracks and corrosion. Chapter 28 b. Examine fuel system components for leaks and general condition.
  • Page 120 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-26. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 6 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine electrical bonding strips for condition and security, if installed. Examine fairings for condition and security, if installed. Examine crosstube riveted or clamped supports for condition and security.
  • Page 121 BHT-206A/B-SERIES-MM-1 PROGRESSIVE INSPECTIONS 5-26. 300-HOUR AIRFRAME PROGRESSIVE INSPECTION — EVENT NO. 6 (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Check oil level of transmission, hydraulic tank, engine, and tail rotor gearbox prior to running helicopter. Make sure that helicopter is ready for ground run and that surrounding area is clear.
  • Page 123 BHT-206A/B-SERIES-MM-1 PERIODIC INSPECTION 5-27. 300-HOUR AIRFRAME PERIODIC INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MUCH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ Do this inspection every 300 hours of operation or every 12 calendar months.
  • Page 125 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-28. 100-HOUR INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE 100-hour inspection must be accomplished when using the 300-hour airframe progressive inspection program or the 300-hour airframe periodic inspection program.
  • Page 126 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-28. 100-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 53 TAILBOOM CAUTION AN Y CRA CK , CORROS ION, OR LOOS E OR SHEARED RIVET IS CAUSE FOR IMMEDIATE GROUNDING OF THE HELICOPTER UNTIL THE PROBLEM IS CORRECTED.
  • Page 127 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-29. 300-HOUR INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Every 300 hours of operation, the 300-hour inspection must be accomplished in conjunction with 100-hour airframe...
  • Page 128 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-29. 300-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 96 Examine electrical components behind hat bin for condition, security, and cleanliness. Chapter 53 Examine engine and transmission support structure for cracks, corrosion, or loose fasteners. CAUTION EXERCISE CARE AND USE ADEQUATE SCREW LE N G T H W H E N R E IN S TA L L IN G V E RT IC A L...
  • Page 129 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-29. 300-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 25 and Remove pilot and copilot seat cushions and panels and Chapter 53 examine the following: Chapter 67 and a. Control tubes, N throttle cable, bellcranks, levers, Chapter 76 yokes, and supports for bending, excessive looseness, and security of attachment.
  • Page 130 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-29. 300-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 62 MAIN ROTOR SYSTEM Remove main rotor blade leading edge erosion protection tape, if installed. Examine leading edge of blades for corrosion and erosion. Restore contour as necessary.
  • Page 131 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-29. 300-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 95 Perform operational check of turbine outlet temperature system. Chapter 95 and Examine N and N tachometer generator shaft splines Chapter 12 and gearbox adapter splines for condition. Clean and lubricate shaft splines.
  • Page 132 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-29. 300-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER BHT-206A-FM-1, During ground run, operate helicopter at 100% N BHT-206B-FM-1, minimum of 2 minutes to ensure remaining air is purged from BHT-206B3-FM-1 fuel filter head and to check for fuel leaks. Chapter 28 FUEL PUMP NOTE...
  • Page 133 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-29. 300-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Examine the bearings of the starter generator for smooth rotation. Examine the splines on the starter generator driveshaft and the mating splines on the engine gear shaft for wear. If dry spline starter generator installed, clean splines and lubricate.
  • Page 134 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-29. 300-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DRIVETRAIN Chapter 65 and Examine forward short shaft (steel) splined adapters for Chapter 12 excessive wear and lubricate. NOTE Oil cooler blower impeller 206-061-432-031 requires penetrant inspection.
  • Page 135 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-30. 1200-HOUR INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE This inspection must be accomplished every 1200 flight hours.
  • Page 136 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-30. 1200-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER b. Mechanical damage is not to exceed 0.005 inch (0.127 mm) depth and 1/3 tube circumference. c. Corrosion damage is not to exceed 0.0025 inch (0.0635 mm) depth before, and 0.005 inch (0.127 mm) after repair, and 1/3 tube circumference.
  • Page 137 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-31. AS REQUIRED BY MANUFACTURER INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ENGINE Rolls-Royce 250 Perform engine inspection requirements.
  • Page 139 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-32. WEEKLY INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ Chapter 62 and MAIN ROTOR HUB AND BLADES, AND TAIL ROTOR HUB Chapter 64 AND BLADES NOTE...
  • Page 140 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-32. WEEKLY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER NOTE Do not allow corrosion preventive compound (C-125) to contact tail rotor blade bearings. Apply a light coat of corrosion preventive compound (C-125) to all hub and blade surfaces. Flood areas between main rotor hub grip tangs and blades, latch bolts to grips and yoke fillet areas just inboard of pitch horn to ensure complete coverage.
  • Page 141 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-33. 12-MONTH INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ GENERAL Ensure that a 100 or 300-hour airframe progressive inspection (all four or six events, as applicable) or the 100 or 300-hour airframe periodic inspection has been completed in the last 12 calendar month period.
  • Page 143 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-34. 12 MONTHS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ MAIN ROTOR MAST Chapter 63, Inspect mast assembly internal surface (internal diameter BHT-206A/B/L-Series-...
  • Page 145 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-35. 24-MONTH INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ MAIN ROTOR FLIGHT CONTROL BOLTS/NUTS Remove main rotor flight control bolts/nuts (1 through 13, Figure 5-2).
  • Page 146 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-35. 24-MONTH INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER ASB 206-05-103 FUEL VENT/PURGE FITTING FILTER CLEANING NOTE This inspection is applicable to helicopters S/N 004 through 2123 Post ASB 206-05-103. Remove the fuel valve access panel on the right side of helicopter to gain access to the fuel vent/purge fitting (1, Figure 5-3).
  • Page 147 BHT-206A/B-SERIES-MM-1 Figure 5-2. 24-Month Inspection of Main Rotor Flight Control System Bolts 5-00-00 Export Classification C, ECCN EAR99 30 APR 2013 Rev. 14 Page 117...
  • Page 148 BHT-206A/B-SERIES-MM-1 S/N 004 THROUGH 2123 POST ASB 206-05-103 Fuel vent/purge fitting Packing Filter (213-593) Tube assembly 206AB_MM_05_0002 Figure 5-3. 24-Month Fuel Vent/Purge Fitting Filter Inspection 5-00-00 Page 118 Rev. 14 30 APR 2013 Export Classification C, ECCN EAR99...
  • Page 149 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-36. 300 HOURS OR 6 MONTHS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ Chapter 63 MAIN DRIVESHAFT (206-040-100-ALL) Chapter 12,...
  • Page 151 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-37. 600 HOURS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE If all five of the following modifications have been carried out on transmission 206-040-002-005, this 600-hour inspection is not required.
  • Page 152 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-37. 600 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER MOD 5: Fifth line of data plate. Longer magnetic drain plug B-148 or chip detector B-3228 (refer to AL 206A-58 or SL 206A-133). TRANSMISSION (206-040-002-005) SUN GEAR AND PINION BEARINGS Chapter 63...
  • Page 153 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-37. 600 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (3) If over pins dimensions is greater that REPLACE dimension allowed, inspect gear teeth of sun and planetary gears, and if acceptable, the assembly may re reinstalled. If over pins dimension is less than REPLACE dimensions allowed, replace sun gear.
  • Page 154 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-37. 600 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Determine amount of wear of top case involute spline. If dimension measured between pins is greater than maximum, replace top case. On reassembly, ensure all inspection compound has been removed from inside surfaces, internal oil passages, and oil fitting bosses.
  • Page 155 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-38. 600 HOURS OR 12 MONTHS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ TAIL ROTOR CONTROL TUBE (WITHOUT NYLATRON SLEEVES) Remove and inspect tail rotor control tube for wear at the...
  • Page 156 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-38. 600 HOURS OR 12 MONTHS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (4) If wear is found in any one area in excess of 0.004 inch (0.01 mm) on any side, remove the assembly from service.
  • Page 157 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-39. 1200 HOURS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH INITIAL DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ BHT-206B3-CR&O, MAIN ROTOR HUB ASSEMBLY Chapter 62 NOTE...
  • Page 158 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-39. 1200 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH INITIAL NOTE The 1200 hours of component operation inspection is applicable to transmission 206-040-002-005 when modifications 1 through 5 have been complied with and completion confirmed by modification number on transmission data plate (refer to paragraph...
  • Page 159 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-39. 1200 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH INITIAL Where evidence indicates wear or damage, check dimensions of affected parts. Perform magnetic particle inspection. PLANETARY ASSEMBLY BHT-206A/B-M&O Disassemble planetary assembly. PLANETARY ASSEMBLY INSPECTION Chapter 12 Parts should be inspected immediately after cleaning and then oiled, using approved lubricating oil.
  • Page 160 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-39. 1200 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH INITIAL BHT-206A/B-M&O SUN GEAR Visually inspect for general condition. Perform over pins dimensional inspection. If over pins dimension is greater than REPLACE dimension allowed, inspect gear teeth of sun and planet gears, and if acceptable, the assembly may be reinstalled.
  • Page 161 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-40. 1200 HOURS OR 24 MONTHS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ TAIL ROTOR CONTROL TUBE (WITH NYLATRON SLEEVES) Chapter 67...
  • Page 163 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-41. 1500 HOURS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ Chapter 63, MAIN ROTOR MAST BHT-206A/B/L-Series- CR&O, Chapter 63...
  • Page 164 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-41. 1500 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 63 TRANSMISSION NOTE This inspection is applicable to: • Transmissions 206-040-002-005, -013, and -015 with four pinion planetary (Post TB 206-75-12) provided. Two main case electric chip detectors with cockpit warning light are connected and operational.
  • Page 165 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-41. 1500 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER FREEWHEEL ASSEMBLY Chapter 63 Remove freewheel assembly. BHT-206A/B/L-Series- Disassemble the freewheel assembly to the extent CR&O, Chapter 63 necessary to perform a visual inspection of the clutch assembly, inner shaft, and outer shaft.
  • Page 167 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-42. 1500 HOURS OF COMPONENT OPERATION AND EVERY 50 HOURS THEREAFTER INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ Chapter 62, SWASHPLATE SUPPORT (206-010-452-001, -005, AND...
  • Page 169 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-43. 2250 HOURS OR 60 MONTHS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ TRANSMISSION NOTE This inspection is only applicable to transmission...
  • Page 170 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-43. 2250 HOURS OR 60 MONTHS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Reassemble the transmission. Chapter 63 Install the mast and swashplate assembly into the transmission assembly. Apply sealant, primer, and paint to the required areas. 10.
  • Page 171 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-44. 3000 HOURS OF COMPONENT OPERATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ BHT-206B3-CR&O TAIL ROTOR GEARBOX NOTE For the gearbox 206-040-402, this inspection may be...
  • Page 172 BHT-206A/B-SERIES-MM-1 SCHEDULED INSPECTIONS 5-44. 3000 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Inspect spiral bevel gear and input pinion gear for corrosion and chipped, broken, or worn gear teeth. Inspect gear wear patterns. Visually inspect accessible areas of input pinion duplex bearing, input pinion roller alignment bearing, and output shaft roller alignment bearing and race for roughness, spalling, scoring, pitting, flaking, broken or damaged retainers, and for...
  • Page 173 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-45. SPECIAL INSPECTIONS • 1 to 5 hours after each installation • 3 to 8 hours after each installation Accomplish the following special inspections on the helicopter (paragraph 5-46 through paragraph 5-50): • 10 to 25 hours after each installation •...
  • Page 174 BHT-206A/B-SERIES-MM-1 Table 5-4. Special Inspections INSPECTION SCHEDULE HOURS AFTER INITIAL INSTALLATION COMPONENT INITIAL 1 TO 5 3 TO 8 10 TO 25 100 ±10 HOURS HOURS HOURS HOURS Main Rotor Hub Mast Nut Torque Check (paragraph 5-47) Pillow Block Retention Bolts Torque Check (paragraph 5-48)
  • Page 175 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-46. AFTER FUEL SYSTEM MAINTENANCE AND/OR COMPONENT CHANGE INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish immediately...
  • Page 176 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-46. AFTER FUEL SYSTEM MAINTENANCE AND/OR COMPONENT CHANGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER b. Service fuel cell with 10 gallons (37.90 L) of fuel. BHT-206A-FM-1, c. Perform normal engine starting and run-up checks. BHT-206B-FM-1, BHT-206B3-FM-1 d.
  • Page 177 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-47. 1 TO 5 HOURS AFTER EACH INSTALLATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ MAIN ROTOR Chapter 62, Torque check main rotor mast nut 250 to 275 foot-pounds...
  • Page 179 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-48. 3 TO 8 HOURS AFTER EACH INSTALLATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ MAIN ROTOR ASB 206-97-90 Torque check pillow block retention bolts/nuts 84 to...
  • Page 181 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-49. 10 TO 25 HOURS AFTER EACH INSTALLATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ SWASHPLATE ASSEMBLY Chapter 62 Check swashplate tilt friction.
  • Page 182 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-49. 10 TO 25 HOURS AFTER EACH INSTALLATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 65 TAIL ROTOR GEARBOX Torque check tail rotor gearbox retaining nuts 50 to 70 inch-pounds (5.6 to 7.9 Nm). Repeat every 10 to 25 hours until torque has stabilized.
  • Page 183 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-50. 100 HOURS AFTER EACH INSTALLATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ POWER PLANT Chapter 71, Torque check engine mount attachment hardware at TB 206-13-204...
  • Page 184 BHT-206A/B-SERIES-MM-1 SPECIAL INSPECTIONS 5-50. 100 HOURS AFTER EACH INSTALLATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER NOTE If a nut is improperly torqued, remove and check tare torque, and replace as required. Recheck torque at next 100 hours. Check transmission top case stud nuts for torque 50 to 70 inch-pounds (6 to 8 Nm).
  • Page 185 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-51. CONDITIONAL INSPECTIONS • Overspeed — Main Rotor • Overtorque Accomplish applicable Conditional Inspection (paragraph 5-52 through paragraph 5-60) of helicopter after: • Engine Compressor Stall or Surge • Hard Landing • Lightning Strike • Sudden Stoppage — Main Rotor •...
  • Page 187 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-52. HARD LANDING INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ HARD LANDING A hard landing is defined as any incident in which impact of helicopter with ground causes severe pitching of main rotor.
  • Page 188 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-52. HARD LANDING (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 32 Inspect landing gear skid tubes and crosstubes for damage and deflection. BHT-ALL-SPM Remove riveted or clamped crosstube support and accomplish NDI inspection of forward and aft crosstube. Chapter 53 Inspect crosstube attachment points on fuselage for damage or distortion.
  • Page 189 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-52. HARD LANDING (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER BHT-206B3-CR&O, (2) Overhaul the main rotor hub assembly in Chapter 62 accordance with the conditional inspection criteria. (3) Overhaul drive collar, link, and lever. (4) Overhaul all connecting control tubes and scrap all connecting control bolts.
  • Page 190 Transmission assembly c. Main driveshaft assembly d. Isolation mount e. Remove main rotor blades and send to a Bell Helicopter Textron approved blade repair facility for evaluation. Chapter 53 17. Inspect engine mounts at fuselage attachment points for cracks.
  • Page 191 Chapter 63 k. Isolation mount Chapter 62 l. Remove main rotor blade and send to a Bell Helicopter Textron approved blade repair facility for evaluation. m. Replace all control bolts from hydraulic servo actuator to main rotor hub. BHT-206A-FM-1, 24. Provided no visual damage was found, start engine and...
  • Page 193 Check tip weights. If any movement of tip weights has occurred, blade shall be scrapped. After sudden stoppage of main rotor, remove both main rotor blades. Send blades to a Bell Helicopter Textron approved repair facility for evaluation. 5-00-00 Export Classification C, ECCN EAR99 30 APR 2013 Rev.
  • Page 194 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-53. SUDDEN STOPPAGE/ACCELERATION — MAIN ROTOR — POWER ON OR OFF (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Remove the following components and visually inspect for evidence of torsional yielding, deformation, cracks, or other obvious damage that would render them non-repairable. Unless otherwise specified, conduct an overhaul of these components.
  • Page 195 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-53. SUDDEN STOPPAGE/ACCELERATION — MAIN ROTOR — POWER ON OR OFF (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER NOTE If main rotor mast has evidence of torsional yielding, the mast assembly, transmission assembly, main driveshaft, and freewheel assembly (outer race, inner race, and clutch)
  • Page 196 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-53. SUDDEN STOPPAGE/ACCELERATION — MAIN ROTOR — POWER ON OR OFF (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER NOTE If a tail rotor driveshaft has failed as a result of torsional overload, the forward short shaft, the aft short shaft, the fan shaft, the impeller, all hangers, driveshafts, adapters, and disc couplings shall be considered unserviceable and scrapped.
  • Page 197 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-53. SUDDEN STOPPAGE/ACCELERATION — MAIN ROTOR — POWER ON OR OFF (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER • Any deformation of any coupling disc that results in gaps between laminates greater than 0.015 inch (0.381 mm) •...
  • Page 199 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-54. SUDDEN STOPPAGE/ACCELERATION — TAIL ROTOR INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ Sudden stoppage is defined as any rapid deceleration or acceleration of drive system whether caused by seizure within helicopter drive system, sudden freewheel clutch engagement, or by contact of tail rotor blades with ground, water, or with a...
  • Page 200 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-54. SUDDEN STOPPAGE/ACCELERATION — TAIL ROTOR (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER BHT-206B3-CR&O Overhaul the following components: a. Tail rotor gearbox assembly b. Freewheel assembly c. Main driveshaft assembly d. Tail rotor pitch change mechanism BHT-206B3-CR&O Inspect all tail rotor driveshaft, impeller, steel and aluminum adapters, flexible coupling discs, and hangers using magnetic...
  • Page 201 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-54. SUDDEN STOPPAGE/ACCELERATION — TAIL ROTOR (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER NOTE Step 7, substep a and substep b are not applicable to riveted tail rotor segmented driveshafts. BHT-206B3-CR&O In addition, all bonded tail rotor driveshafts shall be considered unserviceable and scrapped, if during a sudden stoppage inspection any of the following conditions, which are attributable to sudden stoppage, are noted:...
  • Page 203 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-55. OVERSPEED MAIN ROTOR — 114% OR GREATER INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Components removed...
  • Page 204 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-55. OVERSPEED MAIN ROTOR — 114% OR GREATER (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER b. Main rotor blades. (1) Dimensionally check main rotor blade retention bolt hole for indications of permanent deformation or damage. If inside diameter of bushing in hole is elongated in excess of 0.0015 inch (0.038 mm), remove blade from service and return it to a major overhaul facility for further inspection.
  • Page 205 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-55. OVERSPEED MAIN ROTOR — 114% OR GREATER (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER d. Overhaul the main rotor hub assembly in accordance with the conditional inspection criteria. e. Overhaul the tail rotor hub assembly. BHT-ALL-SPM f.
  • Page 207 BHT-206B3-CR&O (1) Main rotor blades and attachments. Blade for skin wrinkles and bond separation. If any indications of wrinkles or deformation exists, send blades to a Bell Helicopter Textron repair facility for evaluation. (2) Main rotor hub assembly 5-00-00 Export Classification C, ECCN EAR99 30 APR 2013 Rev.
  • Page 208 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-56. OVERTORQUE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (3) Transmission top case (4) Transmission mount spindles (5) Cabin roof and beam at transmission mount support assemblies attachment points (6) Cabin roof and beam at transmission isolation mount attachment point (7) Tail rotor hub, blades, and attachments b.
  • Page 209 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-56. OVERTORQUE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Rolls-Royce 250 Refer to applicable Rolls-Royce 250 Series Operation and Series Operation and Maintenance Manual for applicable inspection requirements. Maintenance Manual, 5W2 or 10W2 BHT-206B3-CR&O After the first 25 hours following an overtorque, conduct a thorough visual inspection of the following: a.
  • Page 210 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-56. OVERTORQUE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER NOTE Components removed from helicopter for evaluation following an overtorque shall be evaluated as an interrelated group. Removal records accompanying each component shall cross-reference part and serial numbers of other drive system components removed for evaluation.
  • Page 211 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-56. OVERTORQUE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER BHT-206A/B/L-Series- c. Main rotor mast CR&O BHT-206A/B-M&O, d. Transmission top case BHT-206B3-CR&O e. Transmission spindles, pylon support links, and deck fittings f. Cabin roof shell and beam at transmission mount attachment points g.
  • Page 213 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-57. ENGINE COMPRESSOR STALL OR SURGE INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE An engine compressor stall or surge can be described as a sharp rumble, a series of loud sharp pops, severe engine vibration, or a rapid rise in...
  • Page 214 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-57. ENGINE COMPRESSOR STALL OR SURGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER • If the compressor stall or surge occurred on the ground or in flight at any N speed or torque setting, and there was a noticeable yaw of the helicopter, do Part I, Part II, and Part III of this inspection.
  • Page 215 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-57. ENGINE COMPRESSOR STALL OR SURGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER NOTE Removal or dismantling of components is not required while performing the following inspection. PART II: INSPECTION FOR COMPRESSOR STALL OR SURGE WITHOUT NOTICEABLE YAW Chapter 63 and DRIVE SYSTEM Chapter 65...
  • Page 216 Historical Service Record, and attach a tag on the tail rotor blade(s) and write "THIS BLADE WAS REMOVED FROM SERVICE BECAUSE OF A COMPRESSOR STALL/SURGE". Send the tail rotor blades assembly to a Bell Helicopter Textron approved rotor blade repair facility for further inspection and repair.
  • Page 217 Service Record, and attach a tag on blades and write "THIS BLADE WAS REMOVED FROM SERVICE BECAUSE OF A COMPRESSOR STALL/SURGE". Send the blades to a Bell Helicopter Textron approved rotor blade repair facility for further inspection and repair. If no defects were detected on any blade, the blades are serviceable.
  • Page 218 Historical Service Record, and attach a tag and write “THIS COMPONENT WAS REMOVED FROM SERVICE BECAUSE OF A COMPRESSOR STALL/SURGE”. Send the component to a Bell Helicopter Textron approved facility for overhaul. PART III: INSPECTION FOR COMPRESSOR STALL OR SURGE WITH NOTICEABLE YAW...
  • Page 219 Record, and attach a tag on the tail rotor gearbox and write “THIS COMPONENT WAS REMOVED FROM SERVICE BECAUSE OF A COMPRESSOR STALL/SURGE”. Send the tail rotor gearbox to a Bell Helicopter Textron approved facility for overhaul. If no defects were detected on the gears, the tail rotor gearbox is serviceable.
  • Page 220 Historical Service Record, and attach a tag and write “THIS COMPONENT WAS REMOVED FROM SERVICE BECAUSE OF A COMPRESSOR STALL/SURGE”. Send the component to a Bell Helicopter Textron approved facility for overhaul. If no metal particles were found, the transmission assembly, freewheel assembly, and/or tail rotor gearbox are serviceable.
  • Page 221 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-58. LIGHTNING STRIKE INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ LIGHTNING STRIKE Because lightning behavior is difficult to predict, conduct a thorough inspection of entire helicopter.
  • Page 222 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-58. LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Visually inspect all external surfaces of helicopter. Pay particular attention to main rotor blades and hub, main rotor mast and controls, transmission and mounts, power plant and mounts, main and tail rotor driveshafts, tail rotor gearbox, tail rotor blades and hub, vertical fin and horizontal stabilizer.
  • Page 223 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-58. LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER f. Remove tail rotor driveshaft bearing hangers and tail rotor gearbox for overhaul. g. Check vertical fin for evidence of burning or debonding. h. Inspect tailboom fitting for indication of arcing burns around mounting points of tail rotor gearbox and vertical fin.
  • Page 224 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-58. LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (1) If indications of arcing, burning, or roughness of bearing are present, remove transmission and mast assembly, and freewheel unit, and return for overhaul. c. Remove transmission top case and inspect for entry and exit of lightning strike.
  • Page 225 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-58. LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (1) If evidence of arcing or burning is found, or if bearings do not rotate smoothly, remove gearbox and return it for overhaul. (2) If no indications of damage are found, and if bearings rotate smoothly, reassemble gearbox and return it to limited service.
  • Page 226 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-58. LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER h. Inspect tailboom, horizontal stabilizer, and vertical fin for evidence of arcing, burning, or debonding. Pay particular attention to area around the mounting points for the tail rotor driveshaft hangers and tail rotor gearbox.
  • Page 227 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-59. ENGINE OVERTEMP INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ ENGINE OVERTEMP — Inspect. Rolls-Royce 250 Perform hot end inspection of power plant assembly if start Series Operation and...
  • Page 229 BHT-206A/B-SERIES-MM-1 CONDITIONAL INSPECTIONS 5-60. PYLON WHIRL INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ PYLON WHIRL NOTE Perform pylon whirl inspection following pilot report or evidence of abnormal landing, excessive slope landing, operation in severe turbulence, low rotor RPM during flight (power ON or OFF), rapid and...
  • Page 231 BHT-206A/B-SERIES-MM-1 COMPONENT OVERHAUL SCHEDULE 5-41. COMPONENT OVERHAUL SCHEDULE CAUTION The Component Overhaul Schedule (Table 5-5) provides the time interval between overhaul for each applicable helicopter component. OVERHAUL SCHEDULE FOR SOME KIT COMPONENTS AND/OR PARTS IS NOT COVERED IN THIS SCHEDULE. REFER WARNING A P P L I C A B L E S E R V I C E...
  • Page 232 BHT-206A/B-SERIES-MM-1 Table 5-5. Component Overhaul Schedule OVERHAUL INTERVAL NOMENCLATURE PART NUMBER (HOURS) MAIN ROTOR CONTROLS Swashplate and Support 206-010-450-001 and -005 4800 hours MAIN ROTOR HUB Hub Assembly 206-010-100-003 1200 hours Hub Assembly 206-011-100-001, -003, -005, -007, -011, -017, 1200 hours and -021 Hub Assembly 206-011-100-103 and -107...
  • Page 233 BHT-206A/B-SERIES-MM-1 Table 5-5. Component Overhaul Schedule (Cont) OVERHAUL INTERVAL NOMENCLATURE PART NUMBER (HOURS) TAIL ROTOR SYSTEM (CONT) Tail Rotor Gearbox 206-961-401-001 1200 hours Tail Rotor Gearbox 206-040-402-003 6000 hours HYDRAULIC SYSTEM Hydraulic Pump and Reservoir 206-076-022-001 3600 hours Hydraulic Servo Actuator 206-076-025-001 2400 hours Hydraulic Servo Actuator...
  • Page 234 BHT-206A/B-SERIES-MM-1 Table 5-5. Component Overhaul Schedule (Cont) NOTES: The operating time specified for overhaul of any given part number listed applies to all successive dash numbers (or suffixes) for that component, unless otherwise specified. The overhaul interval of the main rotor hub assembly 206-011-100-127 may be increased to 2400 hours provided main rotor yoke 206-011-149-105 is installed.

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