TECHNICAL BULLETIN INDEX

Transcription

1 TECHNICAL BULLETIN INDEX THE. COLUMN INDICATES THE MAINTENANCE AND/OR OVERHAUL MANUAL CHAPTER/S AFFECTED BY THE RESPECTIVE BULLETIN; OR, THE BULLETIN IS APPLICABLE TO A SERVICE INSTRUCTION (S.I.). 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 is forbidden without prior written authorization from Bell Helicopter Textron, Inc. Newly released Technical Bulletins can be viewed and printed by accessing our Service Directives website at This publication supersedes BHT-412/412EP- TB INDEX dated 1 January 2007 in its entirety. COPYRIGHT NOTICE COPYRIGHT 2008 BELL HELICOPTER TEXTRON INC. AND BELL HELICOPTER TEXTRON CANADA LTD. ALL RIGHTS RESERVED 1 JANUARY 2008

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3 STATUS CODE A = Active A- ( ) = Active (Additional Information) I = Inactive I- ( ) = Inactive (Reason) P = Incorporated in Parts Catalog R = Referenced in Maintenance Manual I = Incorporated in Maintenance Manual P = Incorporated in Parts Catalog S = Superseded (New Bulletin Number) R = Referenced in Maintenance Manual Basic I- (I) 4 Model 412 Compartment Retirement Life Extension Basic I- (R) 67 Input Lever Assembly, Hydraulic Research P/N , and Rod End P/N NHHE6-21W, Replacement of Basic I- (P/R) 29 Installation of Hydraulic Pump, P/N /-101, as an Alternate Part to Pump, P/N PV , in Hydraulic System No Basic A 53 Floor - Forward Fuselage Panel Assemblies, P/N and -102 and Panel Assembly, P/N , Modification of Basic A- (P) 71 Baffle - Top Engine Cowl, P/N , Modification of 1

4 Basic Ground Handling of Model 412 Helicopter Tire, P/N x 4 1-2; Tube, P/N x 4 1-2; Replacement Skid Tube, P/N , Modification for Ground Handling at Helicopter Weights Above 8,000 Pounds; Aft Crosstube of Skid Gear, Strap for Ground Handling at High Gross Weights Basic A- (P) 11 Magnetic Compass Warning Decal, Installation of Basic A S.I. Step Installation, P/N , Inspection and Modification of Basic I- (I) 5 Directional Hydraulic Servo Actuator, P/N , Change of Overhaul Interval Basic Basic I- (S) 28 Engine Fuel Switch, Inspection of A- (P) 53 Fin, P/N , Modification of Basic Spindle, Main Rotor P/N , Corrosion Repair, Prevention and Protection of Basic A- (P) 53 Pylon Access Covers, P/N and , and Panels, P/N and P/N , Modification of Basic A- (P) 25 Crew Seat Assy, P/N , Ease of Operation, Modification for Basic A- (P) 25 Crew Seats, P/N , Travel Extension, Modification for Basic A 32/S.I. Skid Tubes and Crosstubes on Landing Gear Subassembly, P/N A, -101B, Inspection and Repair of 2

5 Basic I- (I) 18 Main Input Driveshaft, P/N , Dynamic Balancing of Basic I- (P) 96 Upper and Lower Anti-Collision Light, Replacement of Basic I- (R) 97 Eliminate Capability of Aft Cabin Interphone Stations to Transmit on Air Traffic Control COMM Radios Basic A- (P/R) 62 Driver Assembly Rephase Lever, P/N , Replacement of Basic A 95 Yaw Rate Gyro, Removal of Basic A- (P) 32 Skid Tube Assembly, P/N , -102, -103, and -104, Modification of Basic A- (R) 96 Hydraulic Pressure Transmitter, Electrical Connector, P/N MS3456W14S-5S, Potting Compound, Application of Basic I- (S) 95 Instrument Panel Assembly, P/N , Modification of Basic A- (R) 29 Hydraulic Pumps, P/N (Abex Model AP2V-82, P/N 66007) and P/N (Abex Model AP2V-81, P/N 66005), Seal Retainer Gasket, Installation of Basic I- (P) 96 Hydraulic Oil Temperature Switch, P/N 83154, Replacement of Basic I- (S) 96 Torque Transmitter, P/N , Calibration of Basic A- (P) 67 Flight Control Cylinder, P/N , Input Lever Assembly, Replacement of Basic A- (P) 52 Door Assembly, P/N , Inside Handle, Addition of Basic A 52 Latch Installation, Crew Door, P/N /-006, Modification of 3

6 Basic A 67 Horizontal Stabilizer Ribs, P/N and -097, Modification of Basic I- (I) 5 Main Rotor Mast Assembly, P/N , Deletion of Special Inspection Requirement Basic A- (P) 52 Crew Door Hinge, P/N's /-012 (Upper Fixed), /-2, (Upper Movable), /-012 (Lower Fixed), and /-2 (Lower Movable), Bushing of Basic I- (I) 5 Mast Assembly P/N , -105, Increase in Time- Between-Overhaul (TBO) Basic I- (I) 5 Transmission Assembly, P/N , Increase in Time- Between-Overhaul (TBO) Basic I- (I) 5 Gearbox Assembly, 42 Degree, P/N , Increase in Time-Between-Overhaul (TBO) Basic I- (I) 5 Gearbox Assembly, 90 Degree P/N , Increase in Time-Between-Overhaul (TBO) Basic I- (R) 67 Flight Control Cylinder, P/N , Piston Head Seals, Replacement of Basic S.I. Emergency Floats, P/N , -107, -109, and -111, Testing of Basic I- (I) 65 Swashplate Outer Ring Thru Bolts, P/N MS or NAS615-22, Retorque Basic A- (P) 52 Crew Door, P/N , Modification of Basic A- (P) 26 Fire Extinguisher, P/N , Left Side Installation, Modification of 4

7 Basic I- (I) 67 Collective Friction Clamp Assembly, P/N , Friction Liner Replacement Basic I- (I/P) 63 Gross Weight and Horsepower, Increase of Basic A 62 Main Rotor Damper Bridge Assemblies, P/N's , /-105, /-105, and , Rework of Basic A- (R/P) 62 Main Rotor Blade Trim Tab, P/N and , Installation of Basic A- (R/P) 52 Door Assembly, Upper Cabin Nose, P/N , Modification for Water-tightness Basic A- (P) 63 Main Transmission Input Quill Carbon Magnetic Seal, P/N , Installation of Basic I- (I) 5 Main Rotor Hub Assembly, P/N Series, Increase in Time-Between-Overhaul (TBO) Basic I- (I/P) 65 Tail Rotor Blade, P/N (All Dash Numbers), Improved Visibility Paint Scheme Basic Universal Assembly, P/N , Replacement of Bearings Basic Rev B I- (I/P) 62 Drive Link (Dual), P/N , Installation of Basic I- (I) S.I./98 Cargo Release Relay, Rewiring of Basic I- (I) 52 Retainer Secured (Push Out) Passenger Compartment Windows 5

8 Basic A- (P) 29 Hydraulic Pumps, P/N , (Abex Model AP2V-82, P/N 66007) and P/N (Abex Model AP2V-81, P/N 66005), Replacement of External Driveshaft Basic A 96 Generator Control Unit, P/N N, Inspection and Modification of Basic I- (I) 5 Increase in Time-Between- Overhaul (TBO) Interval of the PT6T-3B Power Plant Combining Gearbox, P/N Basic A- (R) 65 Tail Rotor Driveshaft, P/N , Modification of Basic A- (R) 95 "Fuel Low" Caution Segment, One Time Inspection of Basic A- (R) 67 Pilot Collective Stick Tube, P/N , and Copilot Collective Stick Tube, P/N , Inspection of Basic I- (I/P) 11 Markings Installation, P/N , -103, -105, -107, -109, -113, -117, and -121, Tail Rotor Hazard Warning, Decals, Addition of Basic I- (I) S.I. Rotor Brake Assembly, Modification of Basic I- (S) 62 Simple Pendulum Absorber Bolts, P/N MS , Inspection and Retorque Basic A 11 Addition of Identification Decal on Aircraft Exterior Basic A 65 Tail Rotor Counterweight Bellcrank Assembly, P/N , Inspection of Basic I- (I/P) 53 Main Beam Cap P/N Inspection and Replacement with Main Beam Cap P/N

9 Basic A- (P/R) 96 External Power Start Circuit, Modification of Basic A- (P/R) 62 Collective Lever Pin P/N , Introduction of Basic A 53 Plumb Bob Support Installation, P/N , Inspection of Basic A- (P) 29 Hydraulic System Installation, PCI and PCII, Replacement of 2014/ 2024 Aluminum Alloy Flareless Tube Fittings Basic A- (P/R) 28 Improved Fuel Filler Cap P/N , Installation of Basic A- (P) 28 Possible Interference Between Fuel Vent Tubes, P/N and and Emergency Floats when Activated Basic A- (P) 63 Main Rotor Mast Assembly, P/N , Configuration Change and Upgrade Basic A 26 Improved Corrosion Resistant Fire Extinguisher Discharge Outlet Fittings Basic A- (P) 63 Lift Link Fitting, P/N and -101, Inspection of Basic A- (P) 76 Liner Actuator Interference With Bulkhead Basic Rev B Basic Basic A- (P/R) 28 Airborne Canister Type Fuel Boost Pump Assembly, P/N , Installation of A- (P/R) 28 Engine Overboard Fuel Drains, Reroute to Fuel Tanks A- (P/R) 28 Engine Overboard Fuel Drains, Reroute to Fuel Tanks 7

10 Basic A- (R) 5 Increase in Time-Between- Overhaul (TBO) Interval of the PT6T-3B Power Plant Combining (Reduction) Gearbox Basic A- (P/R) 32 Introduction of New Step Actuator P/N Basic A- (P) 63 Main Transmission Assembly, P/N , -109, and -113, Configuration Change and Upgrade Basic I- (I) 18 Scientific Atlanta RADS-AT (Rotor Analysis Diagnostic System- Advances Technology), Installation and Use of Basic I- (I) 76 Torque Transmitter P/N , Calibration of Basic I- (I) 4 Simple Pendulum Absorber Brackets , , and , Increase in Retirement Life Basic A 63 MRC Duplex Bearings P/N , Inspection and Recall Basic I- (I) 76 Improved Clamping Arrangement for Droop Compensator Cable Basic A- (P) 28 Improved Air/Fuel Separator for Forward Fuel Cell Ventilation Basic A 71 Mid Firewall and Induction Baffle Assembly Replacement of Blind Rivets (NAS1398C) with Solid Rivets (MS20615) Basic I- (I) 62 Swashplate Support Assembly P/N , Introduction of Basic I- (I) 5 Transmission Assembly P/N , -109, -113 Increase in Time-Between-Overhaul (TBO) 8

11 Basic Improved Main Rotor Damper Set Bonding and Installation Procedure Basic I- (I) S.I. Service Instruction BHT-412-SI- 30, Elastomeric Bearing Replacement Retrofit Kit P/N Basic A- (P/R) 63 Main Transmission Full Flow Debris Monitor Basic Rev B Basic A- (P) 62 Swashplate and Support Assembly, P/N , Configuration Change and Upgrade A- (P) 53 Introduction of Lift Link Fittings P/N and Bolt P/N , Which Supersedes Lift Link Fitting P/N , and Bolt P/N Basic I- (P) 29 Number 1 Hydraulic System Tube Assembly P/N Basic Basic A 67 Tail Rotor Pitch Change Tube Assembly P/N ALL, Electro Chemical Metallizing A- (P) 71 Improved Inspection Access Doors on Engine Oil Cooler Support Cowing Basic A 29 Hydraulic Pumps P/N PV (Sperry Vickers) Replacement of Driveshaft Basic A- (P) 63 Transmission Oil Pump Key P/N and MS Which were Supplied as Spares, Replacement of Basic I- (S) 62 Replacement of Estane Rubber Boot P/N on 412 M/R Blades Basic A- (P/R) 62 Use of Alternate Main Rotor Blade Bolt in Lieu of Expandable Main Rotor Blade Bolt 9

12 Basic I- (I) 62 Modification of Main Rotor Hub Assembly, P/N (ALL) to Basic A 96 Bench Test Procedure for RPM Limit Detector Assembly P/N and P/N using T Tester Basic A- (R) 28 Model 412SP Fuel System Improvements Basic I- (S) 63 Installation of Improved Rotor Brake Quill P/N Basic A 63 Sump Case Assembly P/N and -017, Rework Procedure to Reduce the Size of the Chip Detector Boss Entry- Countersink Basic A 52 Cool to Touch Coating for Tailboom Baggage Compartment Door Handle Basic I- (I) 62 Improved Installation Procedures for Model 412 Main Rotor Hub Basic I- (I) 53 Introduction to Pylon Mount Assembly P/N Basic I- (I) 62 Installation of Oversized Bushings in Model 412 Yoke Assembly P/N / Basic I- (I) 62 Swashplate Outer Ring Assembly P/N , Introduction of Basic A- (P) 67 Main Flight Control Servo Cyclinder Assembly P/N /-103/ Basic A 96 Pilot Collective Control Panel Assembly Basic I- (I) 62 Lower Main Rotor Damper Bridges /-105, /-105, Increase in Calendar Retirement Life 10

13 Basic A 63 Rotor Brake Quill P/N (or -103 installed in the 412 HP), One Time (External) Inspection Basic A- (P/R) 76 Engine #2 Governor Trim Actuator Basic A- (R) 71 PT6T-3D Engine Assembly P/N Retrofit Basic I- (I) 63 Lower Planetary Spider P/N , Introduction of Basic A 53 Modification to Tailboom Assembly P/N , -121, Basic A- (R) 76 Improved NII Droop Compensator System, Installation of Basic A- (P/R) 63 Mast Torque Temperature Compensator Mounting Bracket, Improvement of Basic Rev B A 53 Baggage Compartment Lower Skin Doubler Basic A 63 Case Assembly, Bevel Gear P/N / Basic A- (R) 25 Crew Seat Attenuators P/N /-117, Verification and Rework of Basic A- (P) 28 Engine Fuel Feed Line Pressure Switches, Modification of Basic A Doubler Installation on L/H Side of Tailboom Fin Basic I- (P) 63 Rotor Brake Assembly Introduction of Stainless Steel Piston Basic A- (P) 95 Installation of Instrument Panel Anti-Vibration Strut Assembly P/N Basic A S.I. Lucas Western Service Bulletins, High Performance Rescue Hoist Assembly, Washer Interference Basic A- (P) 96 Aft Position Light Shock Mount 11

14 Basic A- (P/R) 28 Forward Fuel Tank Level Sensor (Thermistors), Relocation of Basic A- (P) 64 Tail Rotor Hub Assembly P/N , Conversion to -125 Configuration Basic I- (I) 5 Spiral Bevel Gear P/N , Adapter P/N , Elimination of Retirement Life Basic A 96/98 AFCS "FT OFF/DCPL" Indicator, Isolation of Basic A 63 Installation Tool for Replacement of Mast Seal P/N Basic A 71 Improved Fuel Lines, Installation of Basic A 71 Aft Oil Cooler Scoop (Cowling) Latch, Replacement of Basic I- (P) 71/96 Engine/Rotor Tachometer Generator, Replacement of Basic I- (P) 63 Transmission Oil Line Clamping, Improvement of Basic A 53 Tailboom Upper Skin Stiffener Basic A S.I. Steps P/N /-102, Rework to Correct Interference With Actuator Housing Basic I 71 Exhaust Duct Assembly , Exchange or Rework of Basic I- (P/R) 76/95 Gas Producer RPM Increase Basic A- (P/R) 67/98 Yaw Trim Release Switch, Installation of Basic I- (I) 4 Flanged Adapter P/N , Elimination of Retirement Life Basic A S.I. Breeze-Eastern A-60LT Cargo Hooks Basic A- (P) 53 Introduction of Pylon Support Brackets 12

15 Basic A 62 Introduction of Procedures for Elimination of Mast Seal Leaks Basic A 32 Landing Gear Cap Assembly Modification Basic A- (P/R) 96/98 Heated P3 Airline Installation Basic I- (I) 67 SCAS Actuator, Reposition Basic A- (P) 25 Crew Seat Height Adjustment Tube Replacement Basic A- (P/R) 71 Engine Upper Cowling Main Drive Shaft Inspection Door Basic A- (P) 52 New Door Rollers and Sliders Basic A- (P) 63 Tail Rotor Gearbox Shaft Speedi- Sleeve, Addition of Basic I- (P) 76 Throttle Bellcrank Mount Improvement of Basic A- (P) 25 Guide, Crew Seat Shoulder Strap Basic A- (P) 52 New Sliding Door Latch Guards Basic A- (P) 67 Bellcrank Assembly, Rework Basic New Fire Extinguisher Bracket Basic A 71 PT6T-3/B/BE/BF/BG Power Sections, Mixing and Use of Basic A 52 Hinged Panel Assembly, Improvement of Basic A 71 Fuel Pump Larger Diameter Drain Lines, Introduction of Basic A- (P) 67 Pilot and Copilot Collective Stick #1 Throttle Grip, Modification of Basic A- (P) 67 Elevator Control Tube P/N Modification Basic I- (I) 62 Improved Main Rotor (M/R) Spindle and Damper Bearing Basic A- (P) 71 Forward Transmission Fairing Hinge Assembly, Removal of Basic A 67 Cyclic and Collective Jackshaft, Inspection and Modification of 13

16 Basic A 32 Forward Crosstube, Modification of Basic A 63 Main Driveshaft, A) Conversion from to B) Upgrading Main Driveshaft to Basic A- (P/R) 64 Improved Tail Rotor Pitch Links Basic I- (I) 71 Alignment: Engine to Transmission Basic I- (I) 76 Engine Power Turbine Governor Lever Re-Indexing, Introduction of Basic I- (I) Category "A" N2 Rigging Procedure, Introduction of Basic A 53 Tailboom Assemblies P/N /-121/-133/-147/-159/ -177/-191 and -203, Modification for Use on All Model 412 and 412EP Helicopters Basic A 71/76 Improved Engine Torque Transmitting System Benz Model Introduction of Basic A 63 Main Rotor Mast Upgrade to A-111 Configuration Basic A- (R) 96 Digital Automatic Flight Control System Response on the Yaw Axis, Improvement of Basic A 65 Tail Rotor Gearbox Assembly , Modification to -103 Configuration Basic A 62 Main Rotor Blades, Improved Erosion Shield P/N , Introduction of Basic A 63 Main Transmission Assembly, P/N , Configuration Change and Upgrade to P/N

17 Basic A- (P) 63 Transmission Debris Collector Assembly P/N to -101FM, Modification of Basic A- (P) 29 Hydraulic Line Installation, Improvement of Basic A- (P) 63 Transmission Oil Cooler Lines P/N and , Introduction of Basic A 53 Main Beam Landing Gear Support Modification Basic A 96 Replacement of Landing Light Mechanical Relay Assembly with a Solid-State Switch Mounted on a Printed Wiring Board Basic A- (R) 62 Hub and Sleeve Assembly Elimination of Premature Wear to Drive Link /-109 and Hub Assembly Basic A 62 Main Rotor Hub Assembly ALL, Modification of Hardware and Installation Procedure Basic A 63 Main Rotor Brake Quill, to , Modification of Basic A 52 Lower Nose Doors P/N and and Seal Replacement Basic A 53 Tailboom Fin Stiffener Modification Basic I- (I) 4 Flange Adapter P/N and , Elimination of Retirement Life Basic A 63 Transmission Oil Filter Assembly P/N , Introduction of 15

18 Basic A 71 Oil Drain Valve P/N , Powerplant Accessory Gearbox, Improved Security of Screws Basic A 71 Intake Screen Improvements Basic A 63 Transmission Oil Pump , Modification of Basic A 96/98 New Chip Detector Interface Problem with the Master Caution Panel Basic A 62 Simple Pendulum Absorber Additional Washer, Introduction of Basic A- (R) 62 Bearing and Liner Assemblies P/N and P/N : Installation Improvements Basic A 52 Aft Top Cowling Reinforcement Basic A 53 Tailboom Bulkhead Reinforcement Basic A 96 Improved Mast Torque Signal Conditioner, Introduction of Basic A 53 Improved Baggage Compartment Door Seal Basic A 53 Installation of Missing Rigging Rivets Basic A 53 Vertical Fin Cover Hinge Pin Improved Installation Basic A 53 Center Engine Deck Modification for Use on Other Aircraft Basic A 71 Power Section Case Drain Fitting Standardization Basic A 96 Hydraulic System #1 False Warning Indication, Prevention of Basic A 96 Attitude and Heading Reference System (AHRS), Modification of the 26-Volt AC Wiring Basic A 62 Arm and Bearing Assembly Alternate Bolt NAS6604H35, Use of 16

19 NOTICE The following blank pages are provided for entry of additional bulletins when distributed. These additional bulletins will be included in this index at next revision. Blank Page 1 of 2

20 NOTICE The following blank pages are provided for entry of additional bulletins when distributed. These additional bulletins will be included in this index at next revision. Blank Page 2 of 2