BELL HELICOPTER 214B Series Maintenance Manual
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BELL HELICOPTER 214B Series Maintenance Manual

Volume 1. general information
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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.
COPYRIGHT NOTICE
COPYRIGHT
2015
BELL ® HELICOPTER TEXTRON INC.
AND BELL HELICOPTER TEXTRON
CANADA LTD.
ALL RIGHTS RESERVED
Export Classification C, ECCN EAR99
MAINTENANCE MANUAL
VOLUME 1
GENERAL INFORMATION
NOTICE
REISSUE — 11 MARCH 1991
REVISION 9 — 5 MAY 2015
BHT-214B-MM-1

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Summary of Contents for BELL HELICOPTER 214B Series

  • Page 1 NOTICE 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.
  • Page 2 BHT-214B-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-214B-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-214B-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 or 407...
  • Page 5 VALUATE OGISTICS UBLICATIONS Have you found something wrong with this manual — an error, an inconsistency, unclear instructions, etc.? Although we strive for accuracy and clarity, we may make errors on occasion. If we do and you discover it, we would appreciate your telling us about it so that we can change whatever is incorrect or unclear.
  • Page 7 CUSTOMER FEEDBACK Return by fax to Product Support Engineering (450) 433-0272, e-mail to publications@bh.com, or mail to the address on the next page. Manual Title: Manual Number (if assigned): Date of Issue: Date of Last Revision: Section, Chapter, Paragraph Affected: Your Feedback: Now Reads: Should Read:...
  • Page 8 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 9 Please complete this form and return by mail, e-mail (publications@bellhelicopter.textron.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 ___________________________________________...
  • Page 10 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 TAPE HERE Export Classification C, ECCN EAR99...
  • Page 11 BHT-214B-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 13 FAA APPROVED BHT-214B-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 ..............4-00-00 5 MAY 2011 Rev. 6 Page 1/2 ECCN EAR99...
  • Page 15 FAA APPROVED BHT-214B-MM-1 REVISION DATE OF SIGNATURE FAA/ODA* SIGNATURE 22 February 1980 22 January 1981 Chapter 4 not affected 22 June 1981 17 August 1981 Chapter 4 not affected 20 November 1981 Chapter 4 not affected 16 September 1982 17 – 19 7 January 1983 Chapter 4 not affected 9 November 1982...
  • Page 16 BHT-214B-MM-1 FAA APPROVED REVISION DATE OF SIGNATURE FAA/ODA* SIGNATURE 20 February 2002 20 May 2009 5 May 2011 4-00-00 Page 4 Rev. 6 5 MAY 2011 ECCN EAR99...
  • Page 17 H E L I C O P T E R O U T S I D E O F T H E BELL HELICOPTER ARE USED, THEN A P P R O V E D C O M M E R C I A L F L I G H T THE DATA PUBLISHED OR OTHERWISE ENVELOPE.
  • Page 18 Prior to disposing of unsalvageable helicopter parts assemblies are determined by experience, tests, and and materials, caution should be exercised to ensure the judgement of Bell Helicopter Textron engineers. that the parts and materials are disposed of in a The airworthiness lives and inspection intervals cannot manner that does not allow them to be returned for be changed without the approval of the FAA.
  • Page 19 FAA APPROVED BHT-214B-MM-1 Table 4-1. Airworthiness Limitations Schedule (Cont) AIRWORTHINESS LIFE NOMENCLATURE PART NUMBER YEARS/HOURS/RIN ROTATING CONTROLS (CONT) Scissors Assembly 214-010-406-005 2500 hours Scissors Assembly 214-010-406-009 5000 hours Drive Link Assembly 214-010-408-001 5000 hours Drive Link Assembly 214-010-408-005 5000 hours Outer Ring, Swashplate 214-010-403-015, -019 5000 hours...
  • Page 20 BHT-214B-MM-1 FAA APPROVED Table 4-1. Airworthiness Limitations Schedule (Cont) AIRWORTHINESS LIFE NOMENCLATURE PART NUMBER YEARS/HOURS/RIN TRANSMISSION (CONT) Rotor Brake Quill Duplex Bearing 204-040-424-001 600 hours POWER PLANT RELATED SYSTEMS Bipod Assembly 214-060-108-005 10,000 hours Tripod Assembly 214-060-107-005 10,000 hours Aft Strut 214-060-118-001 10,000 hours Sprag Clutch...
  • Page 21 FAA APPROVED BHT-214B-MM-1 Table 4-1. Airworthiness Limitations Schedule (Cont) NOTES (CONT): The following 214-015-001-005 and -011 main rotor blade serial numbers have a 1800-hour service life. All other blade serial numbers have a 3600-hour life if TB 214-78-9 is accomplished. A2-01179 A2-01360 A2-01457...
  • Page 22 BHT-214B-MM-1 FAA APPROVED Table 4-1. Airworthiness Limitations Schedule (Cont) NOTES (CONT): ASB 214-79-7 dated 4-26-79 reduced the life of the 214-010-106-001 and 214-010-226-001 trunnions from 4800 to 300 hours. For components flagged with this note, life is from date of manufacture, any combination of storage and in-service use.
  • Page 23 BHT-214B-MM-1 CHAPTER 5 — INSPECTIONS TABLE OF CONTENTS Paragraph Chapter/Section Page Number Title Number Number INSPECTIONS General ..................5-00-00 Items Not Covered in the Inspection..........5-00-00 Crash Damage................5-00-00 Types of Inspections ..............5-00-00 Definitions ..................5-00-00 Inspection and Overhaul Tolerance ..........5-00-00 SCHEDULED INSPECTIONS Scheduled Inspections..............

  • Page 24: Table Of Contents

    BHT-214B-MM-1 TABLE OF CONTENTS (CONT) Paragraph Chapter/Section Page Number Title Number Number CONDITIONAL INSPECTIONS 5-32 Conditional Inspections..............5-00-00 5-33 After Hard Landing................. 5-00-00 5-34 After Sudden Stoppage..............5-00-00 5-35 After Overspeed................5-00-00 5-36 After Overtorque ................5-00-00 5-37 After Compressor Stall or Surge ............ 5-00-00 5-38 After Lightning Strike..............
  • Page 25 5-1. GENERAL Lead-The-Fleet (LTF), or any other special programs and the judgement of Bell Helicopter Textron engineers. They are subject to change only by Bell This chapter contains the time limit intervals and the Helicopter Textron or an approved airworthiness requirements for the Scheduled Inspection, Special authority.
  • Page 26 5-3. CRASH DAMAGE For the common Bell Helicopter Textron approved Because of the many possible combinations that can optional equipment that is integrated into this result from crash damage, it is not possible to include maintenance manual, refer to this chapter for the the specific repair tasks in this category.
  • Page 27 The engineering aspects of this change are approved. The program is closely monitored by Bell Helicopter Textron in an • Damage —...
  • Page 28 BHT-214B-MM-1 Scheduled inspections, special inspections, interim authority requires to specifically approve inspections, or overhaul intervals required beyond the the inspection and overhaul tolerance. stated tolerances must be approved by Product Support Engineering. If approval of the inspection and overhaul tolerance is required by the applicable governing aviation authority, this is the responsibility of the owner/operator.
  • Page 29 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-7. SCHEDULED INSPECTIONS Scheduled inspections include the airframe and the component inspections. The scheduled airframe inspection intervals are related to the airframe operating time. The scheduled component inspection WARNING intervals are related to the component operating time. FAILURE TO CORRECT CONDITIONS Inspect the helicopter daily, each 25 hours, 100 hours, S U C H A S , B U T N O T L I M I T E D T O ,...
  • Page 31 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish the following checks daily before flight operation.
  • Page 32 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Check helicopter records for recorded discrepancies. Remove all panels, fairings, and cowlings required to satisfactorily carry out the inspection. Record all work accomplished during inspection in the helicopter maintenance record.
  • Page 33 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 32 LANDING GEAR SYSTEM — General Visual Inspection Forward crosstube assembly and retention caps for condition and security of attachment. Aft crosstube assembly and retention caps for condition and security of attachment.
  • Page 34 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 53 All cowlings and fairings for condition and security, missing Chapter 71 fasteners, cracks, and proper operation of latches. Chapter 71 Inlet bellmouth screen for damage and security. Chapter 95 Pitot tube(s) and static ports for obstruction and damage.
  • Page 35 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 66 MAIN ROTOR MAST — Detailed Visual Inspection Mast assembly for security, corrosion, and mechanical damage. Pay particular attention to area contacted by main rotor static stops.
  • Page 36 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER WARNING CAUSE OF ANY DISCOLORATION SHALL BE DETERMINED AND CORRECTED PRIOR TO NEXT FLIGHT. Inspect temperature indicators TEMP-PLATES installed on tail rotor quill coupling for evidence of overheating indication, deterioration, debonding, or excessive discoloration of the epoxy overcoating.
  • Page 37 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 66 ENGINE-TO-TRANSMISSION (MAIN) DRIVESHAFT WARNING CAUSE OF ANY DISCOLORATION SHALL BE DETERMINED AND CORRECTED PRIOR TO NEXT FLIGHT. Visually inspect main driveshaft forward and aft couplings, seals, and surrounding area for grease leakage, damage, corrosion, security, and evidence of overheat as indicated by TEMP-PLATES or coupling discoloration.
  • Page 38 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 29 Hydraulic system 1 and 2 pumps for leaks, damage, and security. Hydraulic system 1 and 2 reservoirs for proper fluid level. Hydraulic system 1 and 2 lines, hoses, and fittings for leaks, damage, chafing, kinking, and security.
  • Page 39 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Inspect driveshaft and intermediate gearbox covers for damage and security. Tail skid for deformation and security of attachment. Chapter 66 TAIL ROTOR DRIVESHAFT WARNING CAUSE OF ANY DISCOLORATION SHALL BE DETERMINED AND CORRECTED PRIOR TO NEXT FLIGHT.
  • Page 40 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER WARNING CAUSE OF ANY DISCOLORATION SHALL BE DETERMINED AND CORRECTED PRIOR TO NEXT FLIGHT. Tail rotor driveshaft coupling at number one hanger bearing assembly for grease leaking and temperature indicators TEMP-PLATES evidence overheating...
  • Page 41 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Overheat TEMP-PLATES for condition and security and excessive discoloration of epoxy overcoating. Chapter 66 TAIL ROTOR GEARBOX — Detailed Visual Inspection Security, oil level, and leaks. Case cracks at lugs.
  • Page 42 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-8. DAILY INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER All exterior lights for proper operation. Fuel quantity indicator checked with test switch. Main and standby inverter checked. governor RPM actuator functionally checked. Cargo hook for electrical release. 5-00-00 Page 20 Rev.
  • Page 43 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-9. 25-HOUR INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish the following checks each 25 hours of flight operation.
  • Page 44 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-9. 25-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Check helicopter records for recorded discrepancies. Remove all panels, fairings, and cowlings required to satisfactorily carry out the inspection. Record all work accomplished during inspection in the helicopter maintenance record.
  • Page 45 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-9. 25-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER MAIN ROTOR BLADES Chapter 65 Metal main rotor blades 214-015-001 only, if BIS has been deactivated or removed. Inspect for cracks and other damage. MAIN ROTOR HUB Chapter 65 Inspect the main rotor hub assembly and installation with particular attention to the spindle to yoke attachment lugs for...
  • Page 47 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-10. 100-HOUR INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish the following checks each 100 hours of flight operation.
  • Page 48 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-10. 100-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 5 Accomplish complete daily and 25-hour scheduled inspections. Review Special Inspections perform special inspections as required. Service Instruction Comply with all inspections and test requirements of all (SI) installed kits.
  • Page 49 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-10. 100-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Cargo beam attachment bolts for proper torque. Cargo beam fitting fasteners for evidence of looseness. Chapter 32 LANDING GEAR SYSTEM — General Visual Inspection Fuselage supports for wear, damage, and security of attachment.
  • Page 50 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-10. 100-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Cabin interior and exterior for general damage/corrosion. All compartments for evidence of water entrapment and corrosion. Ensure all drain holes/lines are open. Chapter 96 Navigation lights for condition and security. Anti-collision lights for condition and security.
  • Page 51 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-10. 100-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER b. Inspect chip detector for debris. If metallic particles are found, determine cause and correct. Clean detector and test circuits. Chapter 71 ENGINE COMPARTMENT Engine bypass air ducts for damage, seals for security and condition.
  • Page 52 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-10. 100-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 53 Vertical fin: a. Open driveshaft cover and visually inspect left and right side forward spar caps for cracks and loose or missing fasteners. b.
  • Page 53 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-10. 100-HOUR INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 66 TAIL ROTOR GEARBOX Change oil. Inspect chip detector for debris. If metallic particles are found, determine and correct cause. Clean chip detector. Test chip detector electrical circuit. Check temperature pressure...
  • Page 55 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-11. 300-HOUR/12-MONTH INSPECTION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish the following checks each 300 hours of flight operation or after 12 calendar months, whichever comes first.
  • Page 56 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-11. 300-HOUR/12-MONTH INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Service Instruction Comply with all inspections and test requirements of all (SI) installed kits. Check helicopter records for recorded discrepancies. Remove all panels, fairings, and cowlings required to satisfactorily carry out the inspection.
  • Page 57 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-11. 300-HOUR/12-MONTH INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 52 DOORS, WINDOWS, EMERGENCY EXIT NOTE The following inspections (step 1 and step 2) are for helicopters equipped with escape panels that may be identified by a rotating handle installed below the passenger door windows.
  • Page 58 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-11. 300-HOUR/12-MONTH INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 27 d. Inspect flight control linkages for condition, security, and wear. e. SCAS actuators for leaks. f. Pilot collective control friction liners for wear and collective control for proper minimum friction load.
  • Page 59 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-11. 300-HOUR/12-MONTH INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER TAILBOOM Chapter 27 Elevator control tubes and linkages for condition and security; elevator horn for proper friction. Chapter 52 Remove inspection panels and access doors on vertical fin Chapter 53 and inspect forward and aft spar assemblies for cracks, corrosion, and loose or missing fasteners.
  • Page 60 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-11. 300-HOUR/12-MONTH INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Directional SCAS actuator for leaks and all linkages for condition, wear, and security. TAIL ROTOR DRIVESHAFT Chapter 66 Disc pack coupling attaching bolts for proper torque. INSTRUMENTS AND ELECTRICAL Chapter 95 All piping and wiring behind instrument panel for loose...
  • Page 61 BHT-214B-MM-1 SCHEDULED INSPECTIONS 5-11. 300-HOUR/12-MONTH INSPECTION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Perform operational check of pitot-static system. 5-00-00 5 MAY 2015 Rev. 9 Page 38A/38B Export Classification C, ECCN EAR99...
  • Page 63 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-12. SPECIAL INSPECTIONS • Each 300 hours or 12 months, whichever occurs first Perform the applicable special inspection of the • Each 500 hours of component operation helicopter: • Each 500 hours of component operation or • After first flight or a maximum of 5 hours 6 months, whichever occurs first following installation...
  • Page 65 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-13. AFTER FIRST FLIGHT OR A MAXIMUM OF 5 HOURS FOLLOWING INSTALLATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE...
  • Page 67 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-14. BETWEEN 5 AND 10 HOURS OF FLIGHT FOLLOWING INSTALLATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Torque check is the term used when the specified...
  • Page 68 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-14. BETWEEN 5 AND 10 HOURS OF FLIGHT FOLLOWING INSTALLATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 65 SWASHPLATE ASSEMBLY Check swashplate for required tilt friction 45 to 55 pounds force. Chapter 65 TAIL ROTOR INSTALLATION Torque check tail rotor retaining nut 135 foot-pounds.
  • Page 69 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-15. BETWEEN 5 AND 25 HOURS FOLLOWING INSTALLATION INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Torque check is the term used when the specified torque or standard torque plus tare torque is applied...
  • Page 70 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-15A. BETWEEN 10 AND 25 HOURS FOLLOWING INSTALLATION OR ADJUSTMENT INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Torque check is the term used when the specified...
  • Page 71 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-16. EACH 25 HOURS OF CARGO HOOK LOAD TIME INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish each 25 hours of cargo hook load time.
  • Page 73 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-17. EACH 50 HOURS OF COMPONENT OPERATION OR 30 DAYS, OR EACH 15 DAYS IN SALT LADEN ATMOSPHERE INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________...
  • Page 75 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-18. EACH 50 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 Accomplish each 50 hours of component operation.
  • Page 76 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-18. EACH 50 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 65 TAIL ROTOR BLADES 214-015-750-005, -109, -113 — Detailed Visual Inspection NOTE Blades S/N A-3032 and prior or any serial number with prefix of ATR or A3 must be inspected each 50 hours of operation until retired from service.
  • Page 77 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-18. EACH 50 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 96 NICKEL CADMIUM BATTERY — Detailed Inspection Remove battery, inspect, and service. 5-00-00 ECCN EAR99 12 DEC 2011 Rev. 7 Page 53...
  • Page 78 BHT-214B-MM-1 214-015-750 TAIL ROTOR BLADE LEADING EDGE DETAIL LEADING CLOSURE EDGE 0.38 IN. 0.38 IN. 3.0 IN. 0.80 IN. 0.12 IN. DETAIL VIEW LOOKING AT UPPER SKIN (LOWER SKIN OPPOSITE) TIP BLOCK UPPER SKIN TIP CLOSURE LOWER SKIN NOTES Figure not to scale. All dimensions are in inches.
  • Page 79 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-19. EACH 100 HOURS OF CARGO HOOK LOAD TIME INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish each 100 hours of cargo hook load time.
  • Page 81 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-20. EACH 200 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 Accomplish each 200 hours of component operation.
  • Page 83 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-21. EACH 300 HOURS OR 12 MONTHS, WHICHEVER OCCURS FIRST INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish each 300 hours or 12 months, whichever...
  • Page 85 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-22. EACH 500 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 Torque check is the term used when the specified torque or standard torque plus tare torque is applied...
  • Page 87 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-23. EACH 500 HOURS OF COMPONENT OPERATION OR 6 MONTHS, WHICHEVER OCCURS FIRST INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE...
  • Page 89 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-24. EACH 500 HOURS OF COMPONENT OPERATION OR 12 MONTHS, WHICHEVER OCCURS FIRST INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE...
  • Page 91 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-25. EACH 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 Accomplish each 600 hours of component operation.
  • Page 93 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-26. EACH 600 HOURS OF COMPONENT OPERATION OR 6 MONTHS, WHICHEVER OCCURS FIRST INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE...
  • Page 94 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-26A. EACH 600 HOURS OR 12 MONTHS, WHICHEVER OCCURS FIRST INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish each 600 hours or 12 months, whichever...
  • Page 95 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-27. EACH 1200 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 Accomplish each...
  • Page 97 MAIN ROTOR BLADES (METAL) (214-015-001) — Detailed Inspection NOTE This inspection applies to metal blades previously inspected and modified by Bell Helicopter Textron (BHT) to either DCB 87 BFT or 214-515-001-101 (Mod B). Main rotor blades field inspected and modified by BHT will be identified on the modification data plate with DCB 87 BFT.
  • Page 99 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-29. EACH 1250 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 Torque check is the term used when the specified torque or standard torque plus tare torque is applied...
  • Page 100 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-29. EACH 1250 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Chapter 66 MAIN ROTOR MAST BHT-214B-CR&O-1 Remove mast assembly and torque check the nuts Chapter 66 214-040-093 and 214-040-095. If torque of the nut 214-040-093 is 800 foot-pounds or less and/or torque of the nut 214-040-095 is 175 foot-pounds or less: a.
  • Page 101 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-29. EACH 1250 HOURS OF COMPONENT OPERATION (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER b. Torque check nut 214-040-195 on input and output quills. If low, torque 250 to 300 foot-pounds. Chapter 66 TAIL ROTOR GEARBOX Visually inspect for general condition.
  • Page 103 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-30. EACH 24 MONTHS INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish each 24 months. Chapter 65 FLIGHT CONTROL SYSTEM BOLTS BHT-214B-CR&O-1...
  • Page 104 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-30. EACH 24 MONTHS (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Clean bolts with cloth dampened with MEK (C-309). Inspect bolts for thread damage, shank wear, and corrosion. Replace any bolt that has damaged threads, detectable shank wear, or exhibits corrosion pitting.
  • Page 105 BHT-214B-MM-1 SPECIAL INSPECTIONS 5-31. EACH TENSION-TORSION STRAP CHANGE INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish at each tension-torsion strap change. BHT-214B-CR&O-1 MAIN ROTOR HUB Chapter 65...

  • Page 107: Conditional Inspections

    BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-32. CONDITIONAL INSPECTIONS • Lightning strike • Hub subjected to excessive flapping during Perform the applicable conditional inspection of low or zero RPM the helicopter after: If the overhaul evaluation is specified, complete • Hard landing both the conditional inspection and normal inspection procedures (as applicable) for that component listed in •...

  • Page 109: After Hard Landing

    BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-33. AFTER HARD LANDING INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish after hard landing. NOTE Components removed shall be evaluated as an interrelated group.
  • Page 110 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-33. AFTER HARD LANDING (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Inspect main and tail rotor blades for evidence of strike damage. If blade strike damage exists, perform sudden stoppage inspection. Visually check the underside of the fuselage and tailboom for ground contact damage.
  • Page 111 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-33. AFTER HARD LANDING (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (2) Transmission. (3) Main driveshaft. b. Hub assembly. (1) The main rotor flexure may be inspected in the following manner without removing the hub from the helicopter. (a) Untie the main rotor such that the blades are free to flap.
  • Page 112 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-33. AFTER HARD LANDING (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (c) If offset is less than 0.025 inch, static stop must be replaced. (d) Repeat procedure to inspect static stop on opposite side of yoke. c.
  • Page 113 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-33. AFTER HARD LANDING (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER f. Inspect engine mounts for yielding or other damage of tubes, rod ends, and attaching parts. Inspect trunnions and airframe attachment fittings by magnetic particle method. g.

  • Page 115: After Sudden Stoppage

    BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-34. AFTER SUDDEN STOPPAGE INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish after sudden stoppage. AFTER SUDDEN STOPPAGE —...
  • Page 116 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-34. AFTER SUDDEN STOPPAGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER NOTE If sudden stoppage inspection is the result of a tail rotor strike, comply with step h through step m. BHT-214B-CR&O-1 a. Main rotor blades. (1) Visually inspect both main rotor blades for evidence of damage.
  • Page 117 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-34. AFTER SUDDEN STOPPAGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (d) Transmission mounting spindles or stops broken. (2) If no condition exists as listed in preceding step c, substep (1), perform a close visual inspection and if no evidence of damage is found, the swashplate assembly and scissors and sleeve assembly may be retained in service.
  • Page 118 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-34. AFTER SUDDEN STOPPAGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (1) Remove and visually inspect speed reducer gearbox. If evidence of yielding or damage exists to the output input adapters, gearbox shall considered unserviceable and scrapped. (2) If gearbox does not exhibit torsional yielding and the gearbox has no other obvious damage that would render it nonrepairable, then the gearbox shall have a conditional...
  • Page 119 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-34. AFTER SUDDEN STOPPAGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (d) Loose or sheared rivets. (e) Scratches in excess of limits in Chapter 66. (2) If inspection reveals no condition as listed in step (a) through step (e) exists, then perform a detailed inspection in accordance with Chapter 66.
  • Page 120 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-34. AFTER SUDDEN STOPPAGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER k. Tail rotor gearbox. (1) Remove tail rotor gearbox. Check for cracks, sheared or bent attaching studs, and evidence of case distortion. If any of these conditions are noted, the gearbox is unserviceable and shall be scrapped.

  • Page 121: After Overspeed

    BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-35. AFTER OVERSPEED INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish after overspeed. AFTER OVERSPEED Rotor overspeed is defined as any incident in which 105% main rotor speed is exceeded.
  • Page 122 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-35. AFTER OVERSPEED (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (4) Tail rotor driveshafts Perform the following inspections if main rotor overspeed exceeds 115%, but is less than 120%: BHT-214B-CR&O-1 a. Remove and perform conditional inspection on the following components: (1) Main transmission (2) Main driveshaft...
  • Page 123 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-35. AFTER OVERSPEED (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Perform the following inspections if main rotor overspeed exceeds 120%: BHT-214B-CR&O-1 a. Remove and perform conditional inspection on the following components: (1) Main rotor mast (2) Main transmission (3) Main driveshaft (4) Speed reducer gearbox...
  • Page 124 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-35. AFTER OVERSPEED (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (5) If discrepancies are found in step (1) through step (3), return both blades to an authorized blade repair station. Make an entry in component record to show that reason for removal is overspeed;...
  • Page 125 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-35. AFTER OVERSPEED (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (4) Speed reducer gearbox (5) Tail rotor driveshafts (6) Tail rotor driveshaft hangers (7) Intermediate gearbox (8) Tail rotor gearbox BHT-214B-CR&O-1 h. Reassemble main rotor hub and blades, balance, and install.

  • Page 127: After Overtorque

    BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-36. AFTER OVERTORQUE INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish after overtorque. AFTER OVERTORQUE Overtorque is defined as any incident in which torsional loads are introduced into the helicopter dynamic system in excess of...
  • Page 128 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-36. AFTER OVERTORQUE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER b. Not in excess of 5 seconds duration but at each fifth occurrence. BHT-214B-MM-1 (1) Perform following inspections within 1 hour flight time after occurrence. (a) Inspect transmission and speed reducer gearbox chip detectors.
  • Page 129 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-36. AFTER OVERTORQUE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER c. If chip detectors and internal filter appear normal, and there is no evidence of internal failure, operate the transmission for 5 hours, then check chip detectors and internal filter. If chip detector and filter inspection does not reveal metal particles, the transmission is satisfactory for service.
  • Page 130 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-36. AFTER OVERTORQUE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER When overtorque exceeds 120%: a. Remove and perform an overhaul inspection of the following components. Make an entry in component record to show reason for removal was overtorque. Install serviceable components.

  • Page 131: After Compressor Stall Or Surge

    BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-37. AFTER 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 Accomplish after compressor stall or surge.
  • Page 132 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-37. AFTER COMPRESSOR STALL OR SURGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Power plant. a. Examine inlet screen for blockage. b. Inspect engine compressor for salt, dust, oil, or other contaminants. If contaminants are found, clean and perform a power check in accordance with engine manufacturer’s Maintenance Manual.
  • Page 133 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-37. AFTER COMPRESSOR STALL OR SURGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER c. If no evidence of damage is found on tailboom pylon and no indication of metal particles are found on chip detectors, clean chip detectors and reinstall.
  • Page 134 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-37. AFTER COMPRESSOR STALL OR SURGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER f. If intermediate gearbox or tail rotor gearbox was removed for evidence of scuffing or scoring of gear teeth, remove input quills of respective gearboxes and inspect gear teeth of pinion and gear using a 10X magnifying glass.
  • Page 135 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-37. AFTER COMPRESSOR STALL OR SURGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Tail rotor hub and blade. a. Perform a close visual inspection of the tail rotor hub and blade. b. Remove tail rotor trunnion bolts and inspect for deformation (shear offset).
  • Page 136 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-37. AFTER COMPRESSOR STALL OR SURGE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER BHT-214B-MM-1 Airframe. a. Check tailboom pylon (fin) and vertical fin for evidence of damaged panels, skin panels, and/or structure and rivets for looseness and/or sheared heads.

  • Page 137: After Lightning Strike

    BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-38. AFTER LIGHTNING STRIKE INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ NOTE Accomplish after lightning strike. AFTER LIGHTNING STRIKE When the helicopter is suspected of having a lightning strike, the following instructions apply.
  • Page 138 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-38. AFTER LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER Perform the following inspections: a. Visually inspect all external surfaces of the helicopter with particular attention to main rotor blades and hub, the transmission and mast assembly, combining gearbox, tail rotor blades and hub, tail rotor gearbox, intermediate gearbox, vertical fin, and airframe.
  • Page 139 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-38. AFTER LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER (a) Visually inspect bearings for signs of electrical arcing or burning. (b) Check bearings for smooth rotation. (2) If no indications are found, reassemble main rotor hub.
  • Page 140 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-38. AFTER LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER e. Inspect tail rotor gearbox assembly. (1) Remove output quill assembly from tail rotor gearbox. Visually inspect gear teeth for signs of electrical arcing or burning.
  • Page 141 BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-38. AFTER LIGHTNING STRIKE (CONT) INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER h. Tail rotor installation. (1) Remove rail rotor hub and blades and inspect for indications of electrical arcing or burning. Disassemble as necessary to determine full extent of damage and replace only those parts exhibiting damage.

  • Page 143: Hub Subjected To Excessive Flapping During Low Or Zero Rpm

    BHT-214B-MM-1 CONDITIONAL INSPECTIONS 5-39. HUB SUBJECTED TO EXCESSIVE FLAPPING DURING LOW OR ZERO RPM INITIAL DATA REFERENCE INSPECTION TASK DESCRIPTION MECH OTHER DATE: __________________W.O. _____________________ FACILITY: _________________ _ ________________________ HELICOPTER S/N: __________ _ ________________________ REGISTRY NO.: ____________ _ ________________________ TOTAL TIME:_______________________________________ SIGNATURE:_______________ _ ________________________ BHT-214B-CR&O-1 Inspect main rotor yoke flexure for straightness.

  • Page 145: Component Overhaul Schedule

    BHT-214B-MM-1 COMPONENT OVERHAUL SCHEDULE 5-40. COMPONENT OVERHAUL SCHEDULE The Component Overhaul Schedule (Table 5-1) CAUTION 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 T O T H E A P P L I C A B L E S E R V I C E INSTRUCTION FOR KIT COMPONENTS...
  • Page 146 BHT-214B-MM-1 Table 5-1. Component Overhaul Schedule NOMENCLATURE PART NUMBER OVERHAUL INTERVAL MAIN ROTOR HUB Hub Assembly 214-010-100-015 1200 hours Hub Assembly 214-010-100-029 2500 hours MAIN ROTOR CONTROLS Swashplate and Support Assembly 214-010-400-007 1200 hours Swashplate and Support Assembly 214-010-400-111 2500 hours Scissors and Sleeve Assembly 214-010-401 1250 hours...
  • Page 147 BHT-214B-MM-1 Table 5-1. Component Overhaul Schedule (Cont) NOMENCLATURE PART NUMBER OVERHAUL INTERVAL HYDRAULIC SYSTEM Dual Power Actuator 214-076-146 3600 hours (Collective and Cyclic) UTILITY Cargo Suspension Assembly 214-070-920-003 3 years NOTES: The operating time specified for overhaul of any given part number listed applies to all successive dash numbers to that component, unless otherwise specified.

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