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SERVICE BULLETINS
Service Bulletins are available free of charge. Service Bulletins that have already been issued are available from the service bulletin library accessed below. New Service Bulletins are posted in the News section of this website and on ATP.
| DOC TYPE | DOC NUMBER | DATE | S269A | S269B | S269-C | S269C-1 | S269D | S269D-A | SUBJECT | Download |
|---|---|---|---|---|---|---|---|---|---|---|
| DOC TYPE | DOC NUMBER | DATE | S269A | S269B | S269-C | S269C-1 | S269D | S269D-A | SUBJECT | Download |
| ASB/SB | N-52.1 | 12/11/1968 | X | X | X | Rework - Tail Rotor Pedal Arm P/N 269A7336-5 | Download | |||
| ASB/SB | N-65 | 15/11/1968 | X | X | X | Kit Modification - Air Intake Assembly Re: Amphibious Float Landing Installation | Download | |||
| ASB/SB | N-11.1 | 29/11/1968 | X | X | X | Field Replacement - Auxiliary Fuel Boost Pump | Download | |||
| ASB/SB | N-55.1 | 09/12/1968 | X | X | X | Engine Lower Coupling Driveshaft P/N 269A5504-3 or Engine Lower Coupling Driveshaft P/N 269A5504-5 or 269A5504-1 | Download | |||
| ASB/SB | N-66 | 10/12/1968 | X | X | X | Blade Weight Installation - P/N 269B1145 Series Main Rotor Blades | Download | |||
| ASB/SB | N-60.1 | X | X | X | Balance Weight Assembly Installed - Low Tip Speed Tail Rotor | Download | ||||
| ASB/SB | N-67 | 21/02/1969 | X | X | X | Inspection Main Rotor Swashplate Scissor Link Assemblies P/N 269A1335 and 269A1336 | Download | |||
| ASB/SB | N-37.2 | 10/03/1969 | X | X | X | Retirement - Bellcrank Assembly, Lateral Pitch Mixer Idler P/N 269A7506 | Download | |||
| ASB/SB | N-68 | 10/03/1969 | X | X | X | Control Cover - Bonding, Upper and Lower | Download | |||
| ASB/SB | N-71.1 | 06/10/1969 | X | X | X | Inspection - Tail Rotor Transmission Assembly P/N 269A6027 or 369A5400 Addendum dated - 10/27/1969. | Download | |||
| ASB/SB | N-69 | 08/10/1969 | X | X | X | Inspection, Corrosion Damage - Main Rotor Driveshaft P/N 269A5305-3 | Download | |||
| ASB/SB | N-70 | 08/10/1969 | X | X | X | Installation - Improved Fuel Injector Assembly | Download | |||
| ASB/SB | N-72 | 17/10/1969 | X | X | X | Periodic and Conditional Inspection - Main Rotor Mast Assembly P/N 269A2020 | Download | |||
| ASB/SB | N-73.1 | 24/03/1970 | X | X | X | Inspection - Idler Pulley Assembly, Axial Play | Download | |||
| ASB/SB | N-75.2 | 14/04/1970 | X | X | X | Inspection - Main Rotor Lead-lag and Flapping Hinge Bolts P/N HS1446-10-68 | Download | |||
| ASB/SB | N-78 | 31/07/1970 | X | X | X | Inspection - P/N HS1446-10-68 Bolt, Lead Lag and Flapping Hinge | Download | |||
| ASB/SB | N-79 | 04/09/1970 | X | X | X | Relocation - Oil Pressure Sender P/N 5654912 and Fuel Pressure sender P/N 5654913 | Download | |||
| ASB/SB | N-81 | 09/11/1970 | X | X | X | Modification - King KY-90A or KY-95 Transceiver Installation | Download | |||
| ASB/SB | N-83 | 01/02/1971 | X | X | X | Installation - Exhaust Heater Modification Kit No. M10065-1 | Download | |||
| ASB/SB | N-84 | 25/02/1971 | X | X | X | Retrofit Kit - Alternate Battery Location | Download | |||
| ASB/SB | N-76.2 | 22/03/1971 | X | X | X | Kit Installation - Main Rotor Thrust Bearing M10044 | Download | |||
| ASB/SB | N-89 | 16/04/1971 | X | X | X | Installation - Mounting Brackets Dual Head Alternator | Download | |||
| ASB/SB | N-91 | 09/06/1971 | X | X | X | Main Rotor Transmission Modification Kit No. M10062 | Download | |||
| ASB/SB | N-92 | 06/07/1971 | X | X | X | Relocation - Warning Indicator Light, Searchlight Control Handle | Download | |||
| ASB/SB | N-93 | 19/07/1971 | X | X | X | Inspection - Main Rotor Hub and Shaft Assemblies P/N 269A5305 and 269A5305-9 | Download | |||
| ASB/SB | N-94 | 26/07/1971 | X | X | X | Runout (TIR) Inspection - Main Rotor Thrust Bearing P/N 269A5050-73 | Download | |||
| ASB/SB | N-62.1 | 04/08/1971 | X | X | X | Kit - Floor Beam Reinforcement | Download | |||
| ASB/SB | N-90.1 | 07/09/1971 | X | X | X | Replacement - Idler Pulley Bearings, P/N 269A5050-62 | Download | |||
| ASB/SB | N-1.4 | 15/09/1971 | X | X | X | Field Modification - Idler Pulley Assembly P/N 269A5514 | Download | |||
| ASB/SB | N-95 | 15/09/1971 | X | X | X | 200-Hour Periodic Replacement - Idler Pulley Bearings | Download | |||
| ASB/SB | N-96 | 08/10/1971 | X | X | X | Modification - Center Back Cushion Assembly P/N 269A4092 | Download | |||
| ASB/SB | N-97 | 08/10/1971 | X | X | X | Modification - Cyclic Pitch Control Installation | Download | |||
| ASB/SB | N-88.1 | 10/11/1971 | X | X | X | 100 Hour Inspection - Engine Exhaust System | Download | |||
| ASB/SB | N-98 | 29/11/1971 | X | X | X | Inspection - Tail Rotor Control Stop P/N 269A7326 | Download | |||
| ASB/SB | N-99 | 15/12/1971 | X | X | X | Inspection - Latch, Belt Drive Clutch Handle, P/N 269A2210 | Download | |||
| ASB/SB | N-100 | 21/12/1971 | X | X | X | Repair of Tail Rotor Blades, P/N 269A6035 Series | Download | |||
| ASB/SB | N-77.1 | 14/02/1972 | X | X | X | Installation - Belt Drive Clutch Cable Guard Kit M10041 | Download | |||
| ASB/SB | N-74.1 | 16/02/1972 | X | X | X | Inspection - Main Rotor Mast Internal Corrosion | Download | |||
| ASB/SB | N-101 | 27/03/1972 | X | X | X | Shim Installation - Tail Rotor Hub at Fork (Teeter) Bearing; Replacement - Tail Rotor Fork Bearing | Download | |||
| ASB/SB | N-80.2 | 01/05/1972 | X | X | X | Static Source Relocation - Modification Kit No. M10059-5 | Download | |||
| ASB/SB | N-64.1 | 20/06/1972 | X | X | X | Upper Pulley Sleeve, Locknut and Spacer - Belt Drive Transmission Assembly | Download | |||
| ASB/SB | N-10.2 | 07/08/1972 | X | X | X | 25 Hour Inspection - Main Rotor Blade | Download | |||
| ASB/SB | N-102 | X | X | X | Inspection - Landing Gear Damper (poppet type) Assembly P/N 269A3150 | Download | ||||
| ASB/SB | N-103 | 14/11/1972 | X | X | X | University Sound System Kit Installation P/N 269A4190-1 and 269A4190-3 Modification of MA-500 Amplifier | Download | |||
| ASB/SB | N-104 | 26/02/1973 | X | X | X | Manually Operated Searchlight Installation P/N 269A4333 Series Wire Replacement Alternator Switch to Circuit Breaker | Download | |||
| ASB/SB | N-106 | 17/03/1973 | X | X | X | Rework - Flotation Gear Installation Kit No. 269A4300-15 | Download | |||
| ASB/SB | N-107 | 06/04/1973 | X | X | X | Modification and Inspection - Belt Drive Idler Pulley Clutch Assembly P/N 269A5447 and 269A5447-3 | Download | |||
| ASB/SB | N-31.1 | 23/04/1973 | X | X | X | Field Installation and Modification - Dual Bolt, Tail Skid Mounting Hardware | Download | |||
| ASB/SB | N-108 | 21/05/1973 | X | X | X | Serialization - Tailboom Support Assembly P/N 269A2015-5 | Download | |||
| ASB/SB | N-3 | 04/05/1966 | X | X | X | Retrofit - Clutch Engagement Spring Assembly Guide | Download | |||
| ASB/SB | N-4 | 04/05/1966 | X | X | X | Modification - Fuel Injection System Bendix RSA5AB1 | Download | |||
| ASB/SB | N-5 | 18/05/1966 | X | X | X | Inspection - Belt Drive Transmission Strut P/N 5422 | Download | |||
| ASB/SB | N-6 | 16/06/1966 | X | X | X | Float Kit - Removable Skid Extension | Download | |||
| ASB/SB | N-8 | 15/07/1966 | X | X | X | Inspection - Belt Drive Idler Pulley Arm P/N 5506 | Download | |||
| ASB/SB | N-7 | 18/07/1966 | X | X | X | Modification - Engine Fuel Pump Drain Line | Download | |||
| ASB/SB | N-2.1 | 02/08/1966 | X | X | X | Modification - Fuel Injection Lines, Cylinders No. 1 and 3 | Download | |||
| ASB/SB | N-12 | 01/09/1966 | X | X | X | Field Modification - Belt Drive Idler Pulley Clutch Shaft P/N 5456 | Download | |||
| ASB/SB | N-13 | 29/09/1966 | X | X | X | Field Modification - Engine Cooling Scroll | Download | |||
| ASB/SB | N-15 | 04/11/1966 | X | X | X | Field Installation - Chip Detector Engine and Transmission | Download | |||
| ASB/SB | N-16.1 | 17/11/1966 | X | X | X | Field Modification - Tail Rotor Assembly | Download | |||
| ASB/SB | N-17 | 17/11/1966 | X | X | X | Field Modification - Fuel Injector System Rosette Fitting | Download | |||
| ASB/SB | N-18 | 01/12/1966 | X | X | X | Tape Application Area - Tail Rotor Blades | Download | |||
| ASB/SB | N-19 | 02/12/1966 | X | X | X | Field Modification - Induction System Air Filter Housing P/N 8143 | Download | |||
| ASB/SB | N-20 | 20/02/1967 | X | X | X | Field Installation - Spring Longitudinal Bungee | Download | |||
| ASB/SB | N-23 | 20/02/1967 | X | X | X | Field Replacement - Main Rotor Driveshaft | Download | |||
| ASB/SB | N-22 | 22/02/1967 | X | X | X | Reverse Installation - Collective Bungee Assembly | Download | |||
| ASB/SB | N-27 | 22/02/1967 | X | X | X | Kit Installation - Exhaust Heater Support | Download | |||
| ASB/SB | N-28 | 01/04/1967 | X | X | X | Removal AN960-416L Washer, Engine Cooling Shroud Side Panel Assembly | Download | |||
| ASB/SB | N-32 | 01/04/1967 | X | X | X | Rerouting - Alternator Wire Ties | Download | |||
| ASB/SB | N-14 | 27/06/1967 | X | X | X | Modification - Throttle Bellcrank and Control Cover Clearance | Download | |||
| ASB/SB | N-35 | 26/07/1967 | X | X | X | Inspection - P/N 269A5513 Bumper Plug, Lower Coupling Driveshaft | Download | |||
| ASB/SB | N-36 | 26/07/1967 | X | X | X | Inspection - Tail Rotor Driveshaft, Excessive End Play | Download | |||
| ASB/SB | N-34 | 07/08/1967 | X | X | X | Locknut Installation - Center Collective Pitch Stick Assembly P/N 269A9962 - Dual Control | Download | |||
| ASB/SB | N-26 | 22/08/1967 | X | X | X | Kit Installation - Low Speed Tail Rotor System | Download | |||
| ASB/SB | N-21 | 23/08/1967 | X | X | X | Bellcrank Installation Servo Fuel Injector Throttle Control | Download | |||
| ASB/SB | N-24 | 19/09/1967 | X | X | X | Main Rotor Blades, P/N 269B1145 Single Configuration Paint | Download | |||
| ASB/SB | N-25 | 01/11/1967 | X | X | X | Bracket Installation - Scroll Assembly | Download | |||
| ASB/SB | N-30 | 08/11/1967 | X | X | X | Exhaust Manifold Assembly Modification to Accommodate New Exhaust Adapter Flange | Download | |||
| ASB/SB | N-33.2 | 13/12/1967 | X | X | X | Kit Installation - Cabin Sealing - RE: Carbon Monoxide Ingestion | Download | |||
| ASB/SB | N-38 | 27/02/1968 | X | X | X | Inspection - Cable, Belt Drive Clutch Control | Download | |||
| ASB/SB | N-40 | 15/03/1968 | X | X | X | Tail Rotor Repair - Erosion, Blade Leading Edge | Download | |||
| ASB/SB | N-41 | 15/03/1968 | X | X | X | AC Engine Mounted Full - Flow Oil Filter - Installation | Download | |||
| ASB/SB | N-42 | 15/03/1968 | X | X | X | Installation - Jumper Wires | Download | |||
| ASB/SB | N-43 & ADD X1 | 28/03/1968 | X | X | X | Retrofit - Dual Clutch Spring Attachment Fitting P/N 269A5436-5 and 269A5436-7 Addendum dated - 04/23/1968 | Download | |||
| ASB/SB | N-44 | 29/03/1968 | X | X | X | Kit Installation - Utility Lights | Download | |||
| ASB/SB | N-45 | 29/03/1968 | X | X | X | Rework Electrical Components - Radio Noise Level Control | Download | |||
| ASB/SB | N-47 | 18/04/1968 | X | X | X | Inspection - Main Rotor Blade Flapping Hinge Bearing | Download | |||
| ASB/SB | N-48 | 02/05/1968 | X | X | X | Retrofit - Alternate Battery Location | Download | |||
| ASB/SB | N-49 | 08/05/1968 | X | X | X | Shim Installation - Bearing, Upper Pulley Assembly | Download | |||
| ASB/SB | N-50 | 08/05/1968 | X | X | X | Retrofit - Throttle, Governor Control System | Download | |||
| ASB/SB | N-53 | 24/06/1968 | X | X | X | Inspection - Tail Boom Center Attachment Fitting P/N 269A2324 | Download | |||
| ASB/SB | N-51 | 18/07/1968 | X | X | X | Kit Installation - Alternator Mounting Assembly - M10024 | Download | |||
| ASB/SB | N-54 | 26/07/1968 | X | X | X | Dashpot Installation - Throttle Control Modification Kit M10040 | Download | |||
| ASB/SB | N-39.2 | 14/08/1968 | X | X | X | Installation - Stiffener Canopy Slat | Download | |||
| ASB/SB | N-57 | 11/09/1968 | X | X | X | Support Clamp Installation - P/N 269A4869 Exhaust Heater Kit | Download | |||
| ASB/SB | N-58 | 12/09/1968 | X | X | X | Inspection - Tail Rotor Blade Assembly P/N 269A6124 | Download | |||
| ASB/SB | N-59 | 09/10/1968 | X | X | X | Inspection and Retirement, Main Rotor Thrust Bearing, P/N 269A5050-50 and -51 Inspection, Field Modification - Main Rotor Mast, Thrust Bearing Nut and Spacer Tube | Download | |||
| ASB/SB | N-61 | 30/10/1968 | X | X | X | Inspection - Tail Rotor Fork Bolts P/N 269A6235 | Download | |||
| ASB/SB | N-63 | 08/11/1968 | X | X | X | Inspection - Tail Rotor Driveshaft Damper Bearing Block P/N 269A5722 and 269A5722-3 | Download | |||
| ASB/SB | N-52.1 | 12/11/1968 | X | X | X | Rework - Tail Rotor Pedal Arm P/N 269A7336-5 | Download | |||
| ASB/SB | N-65 | 15/11/1968 | X | X | X | Kit Modification - Air Intake Assembly Re: Amphibious Float Landing Installation | Download | |||
| ASB/SB | N-11.1 | 29/11/1968 | X | X | X | Field Replacement - Auxiliary Fuel Boost Pump | Download | |||
| ASB/SB | N-55.1 | 09/12/1968 | X | X | X | Engine Lower Coupling Driveshaft P/N 269A5504-3 or Engine Lower Coupling Driveshaft P/N 269A5504-5 or 269A5504-1 | Download | |||
| ASB/SB | N-66 | 10/12/1968 | X | X | X | Blade Weight Installation - P/N 269B1145 Series Main Rotor Blades | Download | |||
| ASB/SB | N-60.1 | 20/02/1969 | X | X | X | Balance Weight Assembly Installed - Low Tip Speed Tail Rotor | Download | |||
| ASB/SB | N-67 | 21/02/1969 | X | X | X | Inspection Main Rotor Swashplate Scissor Link Assemblies P/N 269A1335 and 269A1336 | Download | |||
| ASB/SB | N-37.2 | 10/03/1969 | X | X | X | Retirement - Bellcrank Assembly, Lateral Pitch Mixer Idler P/N 269A7506 | Download | |||
| ASB/SB | N-68 | 10/03/1969 | X | X | X | Control Cover - Bonding, Upper and Lower | Download | |||
| ASB/SB | N-71.1 | 06/10/1969 | X | X | X | Inspection - Tail Rotor Transmission Assembly P/N 269A6027 or 369A5400 Addendum dated - 10/27/1969. | Download | |||
| ASB/SB | N-69 | 08/10/1969 | X | X | X | Inspection, Corrosion Damage - Main Rotor Driveshaft P/N 269A5305-3 | Download | |||
| ASB/SB | N-70 | 08/10/1969 | X | X | X | Installation - Improved Fuel Injector Assembly | Download | |||
| ASB/SB | N-72 | 17/10/1969 | X | X | X | Periodic and Conditional Inspection - Main Rotor Mast Assembly P/N 269A2020 | Download | |||
| ASB/SB | N-73.1 | 24/03/1970 | X | X | X | Inspection - Idler Pulley Assembly, Axial Play | Download | |||
| ASB/SB | N-75.2 | 14/04/1970 | X | X | X | Inspection - Main Rotor Lead-lag and Flapping Hinge Bolts P/N HS1446-10-68 | Download | |||
| ASB/SB | N-78 | 31/07/1970 | X | X | X | Inspection - P/N HS1446-10-68 Bolt, Lead Lag and Flapping Hinge | Download | |||
| ASB/SB | N-79 | 04/09/1970 | X | X | X | Relocation - Oil Pressure Sender P/N 5654912 and Fuel Pressure sender P/N 5654913 | Download | |||
| ASB/SB | N-81 | 09/11/1970 | X | X | X | Modification - King KY-90A or KY-95 Transceiver Installation | Download | |||
| ASB/SB | N-83 | 01/02/1971 | X | X | X | Installation - Exhaust Heater Modification Kit No. M10065-1 | Download | |||
| ASB/SB | N-84 | 25/02/1971 | X | X | X | Retrofit Kit - Alternate Battery Location | Download | |||
| ASB/SB | N-76.2 | 22/03/1971 | X | X | X | Kit Installation - Main Rotor Thrust Bearing M10044 | Download | |||
| ASB/SB | N-89 | 16/04/1971 | X | X | X | Installation - Mounting Brackets Dual Head Alternator | Download | |||
| ASB/SB | N-91 | 09/06/1971 | X | X | X | Main Rotor Transmission Modification Kit No. M10062 | Download | |||
| ASB/SB | N-92 | 06/07/1971 | X | X | X | Relocation - Warning Indicator Light, Searchlight Control Handle | Download | |||
| ASB/SB | N-93 | 19/07/1971 | X | X | X | Inspection - Main Rotor Hub and Shaft Assemblies P/N 269A5305 and 269A5305-9 | Download | |||
| ASB/SB | N-94 | 26/07/1971 | X | X | X | Runout (TIR) Inspection - Main Rotor Thrust Bearing P/N 269A5050-73 | Download | |||
| ASB/SB | N-62.1 | 04/08/1971 | X | X | X | Kit - Floor Beam Reinforcement | Download | |||
| ASB/SB | N-90.1 | 07/09/1971 | X | X | X | Replacement - Idler Pulley Bearings, P/N 269A5050-62 | Download | |||
| ASB/SB | N-1.4 | 15/09/1971 | X | X | X | Field Modification - Idler Pulley Assembly P/N 269A5514 | Download | |||
| ASB/SB | N-95 | 15/09/1971 | X | X | X | 200-Hour Periodic Replacement - Idler Pulley Bearings | Download | |||
| ASB/SB | N-96 | 08/10/1971 | X | X | X | Modification - Center Back Cushion Assembly P/N 269A4092 | Download | |||
| ASB/SB | N-97 | 08/10/1971 | X | X | X | Modification - Cyclic Pitch Control Installation | Download | |||
| ASB/SB | N-88.1 | 10/11/1971 | X | X | X | 100 Hour Inspection - Engine Exhaust System | Download | |||
| ASB/SB | N-98 | 29/11/1971 | X | X | X | Inspection - Tail Rotor Control Stop P/N 269A7326 | Download | |||
| ASB/SB | N-99 | 15/12/1971 | X | X | X | Inspection - Latch, Belt Drive Clutch Handle, P/N 269A2210 | Download | |||
| ASB/SB | N-100 | 21/12/1971 | X | X | X | Repair of Tail Rotor Blades, P/N 269A6035 Series | Download | |||
| ASB/SB | N-77.1 | 14/02/1972 | X | X | X | Installation - Belt Drive Clutch Cable Guard Kit M10041 | Download | |||
| ASB/SB | N-74.1 | 16/02/1972 | X | X | X | Inspection - Main Rotor Mast Internal Corrosion | Download | |||
| ASB/SB | N-101 | 27/03/1972 | X | X | X | Shim Installation - Tail Rotor Hub at Fork (Teeter) Bearing; Replacement - Tail Rotor Fork Bearing | Download | |||
| ASB/SB | N-80.2 | 01/05/1972 | X | X | X | Static Source Relocation - Modification Kit No. M10059-5 | Download | |||
| ASB/SB | N-64.1 | 20/06/1972 | X | X | X | Upper Pulley Sleeve, Locknut and Spacer - Belt Drive Transmission Assembly | Download | |||
| ASB/SB | N-10.2 | 07/08/1972 | X | X | X | 25 Hour Inspection - Main Rotor Blade | Download | |||
| ASB/SB | N-102 | 23/10/1972 | X | X | X | Inspection - Landing Gear Damper (poppet type) Assembly P/N 269A3150 | Download | |||
| ASB/SB | N-103 | 14/11/1972 | X | X | X | University Sound System Kit Installation P/N 269A4190-1 and 269A4190-3 Modification of MA-500 Amplifier | Download | |||
| ASB/SB | N-104 | 26/02/1973 | X | X | X | Manually Operated Searchlight Installation P/N 269A4333 Series Wire Replacement Alternator Switch to Circuit Breaker | Download | |||
| ASB/SB | N-106 | 17/03/1973 | X | X | X | Rework - Flotation Gear Installation Kit No. 269A4300-15 | Download | |||
| ASB/SB | N-107 | 06/04/1973 | X | X | X | Modification and Inspection - Belt Drive Idler Pulley Clutch Assembly P/N 269A5447 and 269A5447-3 | Download | |||
| ASB/SB | N-31.1 | 23/04/1973 | X | X | X | Field Installation and Modification - Dual Bolt, Tail Skid Mounting Hardware | Download | |||
| ASB/SB | N-108 | 21/05/1973 | X | X | X | Serialization - Tailboom Support Assembly P/N 269A2015-5 | Download | |||
| ASB/SB | N-110 | 24/09/1973 | X | X | X | Configuration Modification - 2050 Lb. Gross Weight Conversion Kit No. M10078 | Download | |||
| ASB/SB | N-113 | 03/03/1974 | X | X | X | Grease Quantity Requirements - Belt Drive Transmission Lower Pulley Bearing P/N 269A5050-507 | Download | |||
| ASB/SB | N-118 | 20/05/1974 | X | X | X | Corrosion Prevention/Inspection - Main Rotor Blade, P/N 269A1165 Blade Tip Weight Area and Tip Cap | Download | |||
| ASB/SB | N-119 | 23/05/1974 | X | X | X | Inspection - Replacement Main Rotor Blade Root Fitting Bolts; Main Rotor Blade Damper Bolts | Download | |||
| ASB/SB | N-120 | 29/07/1974 | X | X | X | Wiring Modification - Integrated Dual Communication Console (ATI) | Download | |||
| ASB/SB | N-122 | 04/12/1974 | X | X | X | Inspection - Impeller Bolt Installation | Download | |||
| ASB/SB | N-123 | 04/12/1974 | X | X | X | Inspection and Rework of Main Transmission Strut Assembly P/N 269A5015 | Download | |||
| ASB/SB | N-125 | 02/01/1975 | X | X | X | Static System - Line Restrictor and Drain Fitting Modification Kit P/N M10094 and M10093-3 | Download | |||
| ASB/SB | N-126 | 24/02/1975 | X | X | X | Inspection/Replacement Clutch Actuator Retaining Screws | Download | |||
| ASB/SB | N-86 | 26/02/1975 | X | X | X | Desensitized Throttle Modification Kit No. M10061 | Download | |||
| ASB/SB | N-127 | 05/03/1975 | X | X | X | Reinforcement and Field Repair Canopy Slat P/N 269A2297 or 296A2297-7 | Download | |||
| ASB/SB | N-128 | 25/03/1975 | X | X | X | Replacement of Plug P/N 23425-166 in Pinion Assembly P/N 269A5103 and -9 in Main Rotor Gear Drive Assemblies P/N 269A5175, -3 and -5 with Modification Kit P/N M10104; Securing of P/N 269A5050-1 or -20 Roller Bearing | Download | |||
| ASB/SB | N-87.2 | 25/03/1975 | X | X | X | Installation - Pitch Control Links, Low Tip Speed Tail Rotor Assembly (Kit No. M10067) | Download | |||
| ASB/SB | N-129 | 31/03/1975 | X | X | X | Inspection/Replacement Searchlight Mount Bolts | Download | |||
| ASB/SB | N-131 | 11/08/1975 | X | X | X | Inspection and Possible Replacement - Throttle Gear P/N 269A7223; Pilot and Copilot's Collective Pitch Sticks | Download | |||
| ASB/SB | N-130 | 28/08/1975 | X | X | X | Inspection - Fiberglass Tail Rotor Blades P/N 269A6124, -9, 269A6035, -9, -17, -19, -M, 269ASK15 and 269-6100 | Download | |||
| ASB/SB | N-115.1 | 03/10/1975 | X | X | X | Rework of Engine Mounting Hangar Assemblies P/N 269A8617 and 269A8618 to Eliminate Possible Engine Crankcase to Hangar Assembly Interference | Download | |||
| ASB/SB | N-124-1 | 03/10/1975 | X | X | X | Inspection - Main Rotor Mast; Left and Right Mast Support Tubes; and Replacement of all Attaching Hardware | Download | |||
| ASB/SB | N-132 | 07/11/1975 | X | X | X | Inspection - Horizontal Stabilizers Forward Boom Attach Fitting P/N 269A2518-3 | Download | |||
| ASB/SB | N-133 | 07/11/1975 | X | X | X | Installation of Engine Exhaust Seals P/N 269A8255 | Download | |||
| ASB/SB | N-136 | 01/03/1976 | X | X | X | Longitudinal Cyclic Trim Assembly - Installation of Limit Switch | Download | |||
| ASB/SB | N-112.1 | 26/04/1976 | X | X | X | Wiring Modification - Auxiliary Fuel Pump P/N 269A8311-1 and 269A8303-5 | Download | |||
| ASB/SB | N-138 | 30/04/1976 | X | X | X | Inspection - Lateral Cyclic Trim Control Assembly P/N 269A7316-3, -5, -7, -9 or -11 | Download | |||
| ASB/SB | N-139 | 20/05/1976 | X | X | X | Modification - Left Hand Front Engine Cooling Shroud Panel Assembly P/N 269A8508-15 or -25 and Engine Mounting Bolt Installation | Download | |||
| ASB/SB | N-137.1 | 18/06/1976 | X | X | X | Wire Modification - Wet/dry AG Kit P/N 269A4153, -3 or -5 | Download | |||
| ASB/SB | N-85.3 | 18/06/1976 | X | X | X | Installation - Adapter Mounted Idler Pulley Clutch Assembly Kit No. 269A5447 | Download | |||
| ASB/SB | N-135 | 23/07/1976 | X | X | X | Field Modification and Repair - Manually Operated Searchlight Installation P/N 269A4333-27, -29, -39 and 269A4335-1 | Download | |||
| ASB/SB | N-109.2 | 01/09/1976 | X | X | X | Inspection of Tailboom Support Strut Aluminum End Fittings, PN 269A2016-3 and 269A2016-5; Replacement of Aluminum End Fittings with Stainless Steel End Fittings (Modification Kit No. M10070) | Download | |||
| ASB/SB | N-140 | 01/09/1976 | X | X | X | Field Modification - Fuselage Frame Assembly | Download | |||
| ASB/SB | N-141.1 | 08/03/1977 | X | X | X | Field Modification and Interim Inspections - Belt Drive Clutch Linear Actuator Assembly | Download | |||
| ASB/SB | N-142.1 | 31/05/1977 | X | X | X | Initial Installation of PN 269A5194 Main Rotor Drive Ring Gear Carrier Assembly; Modification of PN 269A5182 Main Gear Drive Upper Housing Assembly | Download | |||
| ASB/SB | N-143 | 31/05/1977 | X | X | X | Periodic Inspection - P/N 269A5179-3 Driveshaft and Coupling Assembly, Main Rotor Gear Drive Assembly P/N 269A5175, -3 or -5 | Download | |||
| ASB/SB | N-117.2 | 11/07/1977 | X | X | X | Dual RPM and Quiet Operation Configuration P/N 269A4957-3 | Download | |||
| ASB/SB | N-145 | 11/07/1977 | X | X | X | Replacement of P/N 269A8244 or -7 Tailboom Clamp Assembly for Muffler/Resonator Kit P/N 269A8245-3 | Download | |||
| ASB/SB | N-144 | 08/08/1977 | X | X | X | Inspection - Throttle Control Cable Assembly | Download | |||
| ASB/SB | N-148 | 19/09/1977 | X | X | X | Inspection of Sump Cap Attach Hardware - Main and Auxiliary Fuel Tank Assemblies | Download | |||
| ASB/SB | N-82.3 | 19/09/1977 | X | X | X | Inspection - Tailboom Center Attach Fitting (PN 269A2324), and Center Frame Aft Cluster Fittings (PN 269A2234 and 269A2235) | Download | |||
| ASB/SB | N-9.2 | 03/10/1977 | X | X | X | Inspection - Possible Retirement Main Rotor Blade | Download | |||
| ASB/SB | N-149 | 28/12/1977 | X | X | X | Installation of Placard P/N 269A4646-191 Declutched Operation Prohibited Above 1600 RPM | Download | |||
| ASB/SB | N-150 | 15/07/1978 | X | X | X | Inspection and Possible Replacement Seat Belt and Shoulder Harness Assembly, P/N 269A4345 (American Safety Flight Systems P/N 500987-401) | Download | |||
| ASB/SB | N-154 | 25/09/1978 | X | X | X | Field Modification of New Four bolt Attachment Configuration - Tail Skid Tube, Tailboom Adapter and Transmission Housing | Download | |||
| ASB/SB | N-151.2 | 07/11/1978 | X | X | X | Inspection - Main Transmission Pinion Asseembly P/N 269A5103-9 | Download | |||
| ASB/SB | N-156 | 15/02/1979 | X | X | X | Field Repair or Removal - Trim Tab Main Rotor Blade P/N 269A1160 Series, 269A1185 Series and 269B1145 Series | Download | |||
| ASB/SB | N-157 | 10/05/1979 | X | X | X | Replacement of Radio Transmit/Intercom Trigger Switch; Rework of Cyclic Pitch Stick Grip Assembly | Download | |||
| ASB/SB | N-158 | 20/07/1979 | X | X | X | P/N 269A4546-5 Clutch Linear Actuator Assembly - Installation of Drain Hole in Actuator Cover | Download | |||
| ASB/SB | N-161 | 28/09/1979 | X | X | X | 100 Ampere Capacity Alternator Installation - Torque Inspection Of Pivot Bolts P/N AN7-12 and NAS1302-2 | Download | |||
| ASB/SB | N-162 | 12/10/1979 | X | X | X | Inspection of Tail Rotor Blade Assembly P/N 269A6035-21 and -23 | Download | |||
| ASB/SB | N-163 | 26/11/1979 | X | X | X | P/N 269A6050 Series and 269A1800-3 - Tail Rotor Pitch Control Assembly - Seating of Bearing Inner Race; Torque Increase for P/N 269A6258 Locknut | Download | |||
| ASB/SB | N-146.2 | 07/12/1979 | X | X | X | Belt Drive Transmission Asseembly Inspection of Lower Pulley Bearings and Shimming of Lower Pulley Bearing Straps; Periodic Torque Checks of Forward Bearing Retaining Nut | Download | |||
| ASB/SB | N-164 | 07/12/1979 | X | X | X | Inspection of P/N 269A5573-11 H-Frame Assembly | Download | |||
| ASB/SB | N-159.1 | 18/12/1979 | X | X | X | Field Installation of P/N 269A5160 Anti-Fretting Liner for P/N 269A5179-3 Driveshaft Coupling Assembly and P/N 269A5194 Ring Gear Carrier Assembly | Download | |||
| ASB/SB | N-166 | 17/03/1980 | X | X | X | Replacement of Seat Belt Assemblies having Fabric to Metal Latching Devices | Download | |||
| ASB/SB | N-167 | 11/07/1980 | X | X | X | Identification and Possible Rework of Seat Belt and Shoulder harness Assemblies | Download | |||
| ASB/SB | N-168 | 18/07/1980 | X | X | X | Rework of Pilot's Seat Cushion Assembly P/N 269A4039 | Download | |||
| ASB/SB | N-172 | 12/09/1980 | X | X | X | Installation of Transmission Chips Warning Light for P/N 269A6027 Tail Rotor Transmission Assembly | Download | |||
| ASB/SB | N-171 | 31/12/1980 | X | X | X | Periodic Check of Main Rotor Blade Elastomeric Damper Assemblies P/N 269A1290-1 | Download | |||
| ASB/SB | N-155.2 | 20/01/1981 | X | X | X | Replacement of P/N 269A6092 or 369A1602 Tail Rotor Drive Fork Hinge Bolt and P/N 269A6093 or 369A1603 Nut; New Assembly Procedure for Tail Rotor Hub and Drive Fork Unit; Periodic Check of Flapping Hinge Bolt Preload | Download | |||
| ASB/SB | N-173 | 30/01/1981 | X | X | X | Sealing of Interfaces of Abrasion Strip and Main Rotor Blade Skin | Download | |||
| ASB/SB | N-174 | 23/02/1981 | X | X | X | Inspection of P/N 269A5050-73 Thrust Bearing; MRC P/N 9210-UP2-2 S/N 539 thru 647 | Download | |||
| ASB/SB | N-177 | 15/04/1981 | X | X | X | Field Inspection and Repair of Tail Rotor Transmission Main Housing Assembly P/N 369A5401 | Download | |||
| ASB/SB | N-56.4 | 06/05/1981 | X | X | X | Inspection - Main Rotor Mast | Download | |||
| ASB/SB | N-160.1 | 12/08/1981 | X | X | X | Rework of Main Rotor Mast Assembly for Improved Corrosion Protection | Download | |||
| ASB/SB | N-153.1 | 28/10/1981 | X | X | X | Inspection and Rework of LTS Tail Rotor Hub P/N 369A1725, -5 and -501 | Download | |||
| ASB/SB | N-180 | 18/01/1982 | X | X | X | Engine Throttle Governor Kit Installation P/N 269A4995-301 | Download | |||
| ASB/SB | N-147.4 | 23/02/1982 | X | X | X | Relocation of Starter Vibrator Circuit Wiring | Download | |||
| ASB/SB | B-250 | 20/03/1982 | X | X | X | Triple-Latch Door - Lower Latch Bolt and Collective Friction Guide Assembly Interference | Download | |||
| ASB/SB | B-251 | 20/03/1982 | X | X | X | Inspection of Clutch Cable Assembly and Termal End (P/N AN669L3RH or MS21260L3RH) | Download | |||
| ASB/SB | N-181 | 09/04/1982 | X | X | X | Inspection, Replacement and New Torque Requirement - P/N 269A5104 Main Transmission Ring Gear, P/N 269A5194 Ring Gear Carrier Assembly and Attach Hardware | Download | |||
| ASB/SB | N-178.1 | 19/04/1982 | X | X | X | Instrument Cluster 3-Pack Conversion - AC to Rochester (28 volt) | Download | |||
| ASB/SB | N-182 | 26/05/1982 | X | X | X | Periodic Inspection of Idler Pulley Support Bracket Assembly, PN 269A5575 and PN 269A5575-3 | Download | |||
| ASB/SB | B-252 | 01/06/1982 | X | X | X | Precision Airmotive Corporation Bulletins PRS-97 and PRS-98 | Download | |||
| ASB/SB | N-179.1 | 17/08/1982 | X | X | X | Inspection and Retirement - PN 269A5179 and 269A5179-3 Drive Shaft and Coupling Assembly, Main Rotor Gear Drive Assembly PN 269A5175 Basic, -3 or -5 | Download | |||
| ASB/SB | N-185 | 12/10/1982 | X | X | X | Operational Check - Fuel Low Warning System | Download | |||
| ASB/SB | N-186 | 15/03/1983 | X | X | X | Corrosion Inspection - Transmission Oil Pressure Switch P/N 269A4576 | Download | |||
| ASB/SB | N-187 | 29/07/1983 | X | X | X | Inspection and Overhaul of Fuel Shutoff Valve P/N 269A4598 | Download | |||
| ASB/SB | N-184.1 | 21/11/1983 | X | X | X | Periodic Check and Initial Replacement - Belt Drive Pulley H-Frame Tie Bar Bracket Assembly, PN 269A5517-7 | Download | |||
| ASB/SB | N-190 | 15/12/1983 | X | X | X | Bungee Installation Kit P/N M10123 - Collective Pitch Stick | Download | |||
| ASB/SB | N-192 | 07/05/1984 | X | X | X | One-time Inspection of main Rotor Hubs and Shafts; P/N 269A5305 and -9 | Download | |||
| ASB/SB | N-193 | 09/01/1985 | X | X | X | Installation - P/N 269A5192 Pinion Aft Bearing Oil Strainer Assembly in Main Transmission Assemblies Built Prior to 1969 | Download | |||
| ASB/SB | N-194 | 09/01/1985 | X | X | X | One-time Inspection and Rework of P/N 269A4262 Inertia Reel Shoulder Harness Assemblies and Installation | Download | |||
| ASB/SB | N-111.3 | 24/01/1986 | X | X | X | Conversion of 12V to 24V Electrical System - Modification Kit No. M10068 and Installation of 24V, 100 Ampere Capacity Alternator - Kit No. 269A4929-1 | Download | |||
| ASB/SB | N-169.1 | 28/02/1986 | X | X | X | alternator Out Indicating Light | Download | |||
| ASB/SB | N-195 | 28/02/1986 | X | X | X | Inspection of Main Transmission Assembly, P/N 269A5175-11, -13, -15 and -17 | Download | |||
| ASB/SB | N-196 | 28/02/1986 | X | X | X | Inspection of Throttle and Governor Control Cable Assemblies | Download | |||
| ASB/SB | N-198 | 28/02/1986 | X | X | X | Inspection and Rework of Tail Rotor Pitch Control Link Assembly, P/N 269A6091-5 and 369A1807-7 | Download | |||
| ASB/SB | N-205 | 22/08/1986 | X | X | X | Identification and Possible Replacement of Radio Communication Relay | Download | |||
| ASB/SB | N-189.1 | 02/09/1986 | X | X | X | Main Rotor Damper Pitch Bearing Case Attach Hole Inspection and Spacer (PN 269A1207) Installation | Download | |||
| ASB/SB | N-207 | 10/11/1986 | X | X | X | Installation and Replacement of Protective Sleeve (Speedi-Sleeve PN 084956) on Tail Rotor Transmission Output Gearshaft | Download | |||
| ASB/SB | N-203 | 19/11/1986 | X | X | X | Visual Check to Ensure that Proper Thrust Bearing Tube is Installed | Download | |||
| ASB/SB | N-208 | 19/11/1986 | X | X | X | Identification and Possible Replacement of Tail Rotor Fork Bolt | Download | |||
| ASB/SB | N-202 | 23/02/1987 | X | X | X | Improved Methods for Checking Idle Mixture and Idle Speed. Operational Check of Fuel System. | Download | |||
| ASB/SB | N-201.1 | 23/03/1987 | X | X | X | Inspection and Sealing of Main Rotor Blade Elastomeric Dampers | Download | |||
| ASB/SB | N-176.2 | 25/03/1987 | X | X | X | Installation of Main Rotor Blade Elastomeric Damper Assemblies P/N 269A1290-1 | Download | |||
| ASB/SB | N-200 | 30/03/1987 | X | X | X | One-time Inspection of Bolt Holes at Tail Rotor Transmission Attachment Area | Download | |||
| ASB/SB | N-175.1 | 09/04/1987 | X | X | X | Installation of PN 269A5593-3 H-Frame with PN 269A5050-78 Bearings | Download | |||
| ASB/SB | N-209 | 09/04/1987 | X | X | X | One-Time Inspection of Belt Drive Upper Pulley Assembly | Download | |||
| ASB/SB | N-206 | 17/04/1987 | X | X | X | United Instruments, Inc. Altimeters (SZR Part No. 369H4505) | Download | |||
| ASB/SB | N-204 | 16/06/1987 | X | X | X | Identification and possible Replacement of Collective Pitch Mixer Bellcrank | Download | |||
| ASB/SB | N-199.1 | 15/07/1987 | X | X | X | One-time Inspection of Main Rotor Driveshaft P/N 269A5304-5 | Download | |||
| ASB/SB | N-213 | 29/09/1987 | X | X | X | Daily Visual Inspection of Droop Stop Nut; One-time Dye Penetrant Inspection of Droop Stop Nut P/N 269A1340 | Download | |||
| ASB/SB | N-211 | 03/11/1987 | X | X | X | Periodic Inspection of Engine Lower Coupling Driveshaft Boot P/N 269A5473 | Download | |||
| ASB/SB | N-214 | 03/11/1987 | X | X | X | Reduced Service Lives for P/N 269A6065 and 369A1706 Tail Rotor Retention Strap Assemblies | Download | |||
| ASB/SB | N-216 | 03/11/1987 | X | X | X | Magnetic Particle Inspection of Main Transmission Pinion Assembly | Download | |||
| ASB/SB | N-218 | 22/01/1988 | X | X | X | Replacement of Auxiliary Fuel Quantity Placard; Installation of P/N 269A4106-3 Instrument Cluster as Replacment for P/N 269A4106 Instrument Cluster | Download | |||
| ASB/SB | N-217 | 29/01/1988 | X | X | X | Identification of Center Frame Aft Cluster Fittings; Installation of P/N 269A4646-19 Support Strut Placards | Download | |||
| ASB/SB | N-220 | 29/01/1988 | X | X | X | One-time Inspection of P/N 269A2234-3 and 269A2235-3 Aft Cluster Fittings | Download | |||
| ASB/SB | N-221 | 29/01/1988 | X | X | X | Return of Cluster Fittings in Spares Inventory; Dye Penetrant Inspection and Removal of Sample Piece from Aft Cluster Fittings; Daily Visual Inspection of Aft Cluster Fittings | Download | |||
| ASB/SB | N-212 | 10/03/1988 | X | X | X | One-time X-ray Inspection of Tail Rotor Blade Spar P/N 269A6035-21 and -23 | Download | |||
| ASB/SB | N-215 | 21/09/1988 | X | X | X | Update of Model 269B and 269C Pilot's Flight Manual; Installation of 269A9928-5 and 269A9928-7 Center Cover Support Bracket | Download | |||
| ASB/SB | N-222 | 21/09/1988 | X | X | X | Textron Lycoming Service Bulletins: No. 480 Oil and Filter Change and Cleaning No. 369G Engine Inspection after Overspeed or Overboost | Download | |||
| ASB/SB | N-224 | 21/09/1988 | X | X | X | Inspection and Possible Replacement of P/N 33-199-915 Fuel Filter Element (Wire Mesh Screen without Stiffeners) | Download | |||
| ASB/SB | N-231 | 31/05/1989 | X | X | X | Identification and Possible Repair of Precision Airmotive Fuel Injector Model RSA-7AA1, Precision Airmotive Service Bulletin PRS-92 | Download | |||
| ASB/SB | N-134.3 | 03/07/1989 | X | X | X | Revised Engine Operating Procedures and Maintenance Practices | Download | |||
| ASB/SB | N-226 | 03/07/1989 | X | X | X | Identification of Belt Drive Clutch Spring Assembly, Inspection of Belt Drive Clutch Engagement Cable, Field Retrofit of 269A5483-1 and 269A5483-3 Belt Drive Clutch Spring Assemblies with New Cable Sub-Assembly | Download | |||
| ASB/SB | N-227 | 03/07/1989 | X | X | X | Inspection of Main Rotor Pitch Bearing Snap Ring Lockwasher | Download | |||
| ASB/SB | N-183-3 | 15/09/1989 | X | X | X | Pilot Preflight Check of Tail Rotor Blade Leading Edge Abrasion StripDetailed Inspection of Tail Rotor Blade Leading Edge Abrasion Strip Bonding Installation of Rivets on Tail Rotor Blade Leading Edge Abrasion Strip | Download | |||
| ASB/SB | N-232 | 06/10/1989 | X | X | X | Inspection of Tail Rotor Driveshaft Damper block Assembly P/N 269A2330-3 | Download | |||
| ASB/SB | N-219 | 24/08/1990 | X | X | X | Detail Inspections of Upper Pulley Stack-up | Download | |||
| ASB/SB | B-237.1 | 30/05/1991 | X | X | X | Possible Restriction of Cyclic Pitch Control | Download | |||
| ASB/SB | N-210.1 | 30/05/1991 | X | X | X | Identification of Throttle Cable Assemblies; Inspection of P/N 269A4683(BSC) or -3 Throttle Cable Assemblies having Threaded End Fittings; Replacement of P/N 269A4683(BSC) or -3 Throttle Cable Assemblies having Threaded and/or Aluminum End Fitting | Download | |||
| ASB/SB | B-236 | 04/09/1991 | X | X | X | Inspection of Low Tip Speed Tail Rotor Swashplate Bellcrank Assembly Hole | Download | |||
| ASB/SB | B-238.1 | 07/11/1991 | X | X | X | Inspection and Retirement of 269A2324(BSC) and -7 Tailboom Center Attachment Fittings | Download | |||
| ASB/SB | B-239.1 | 07/11/1991 | X | X | X | Inspection and Retirement of 269A2324-7 Tailboom Center Attachment Fitting | Download | |||
| ASB/SB | B-248 | 07/11/1991 | X | X | X | Bendix Fuel Injector System Model RSA-7AA1, P/L 2524347 (Lycoming P/N 77885) and Precision Airmotive Corporation Service Bulletin PRS-94 and PRS-94 Suppl 1 | Download | |||
| ASB/SB | B-234 | 16/12/1991 | X | X | X | Inspection and Modification of Longitudinal Trim Mounting Plate and Trim Arm Stop | Download | |||
| ASB/SB | B-233 | 10/02/1992 | X | X | X | One Time Inspection - Engine Oil Cooler | Download | |||
| ASB/SB | B-241 | 10/02/1992 | X | X | X | Inspection of Seat Belt Snap Hook End Fittings | Download | |||
| ASB/SB | B-242 | 10/02/1992 | X | X | X | One Time Inspection of Main Rotor Blades | Download | |||
| ASB/SB | N-229.1 | 10/02/1992 | X | X | X | Part Number Conversion of 369 Series Part Numbers to 269 Series Part Numbers that are Used on 269 Series Helicopters | Download | |||
| ASB/SB | B-235.1 | 20/03/1992 | X | X | X | Possible Restriction of Throttle Controls | Download | |||
| ASB/SB | B-249 | 20/03/1992 | X | X | X | One Time Inspection of Throttle Override Bellcrank Assembly | Download | |||
| ASB/SB | B-240 | 08/05/1992 | X | X | X | one Time Inspection - Thrust Bearing Nut P/N 269A1315 with Possible Incomplete Threads | Download | |||
| ASB/SB | B-243 | 08/05/1992 | X | X | X | Corrosion Damage Inspection of Main Rotor Driveshaft P/N 269A5305 | Download | |||
| ASB/SB | B-245 | 08/05/1992 | X | X | X | Maintenance and Operation Requirements for Safe Operation of Surplus TH-55A Helicopters | Download | |||
| ASB/SB | B-247 | 30/10/1992 | X | X | X | Tail Rotor Pedal Bulkhead (Floor Beam) Gusset | Download | |||
| ASB/SB | B-255.1 | 01/02/1993 | X | X | X | Main Rotor Driveshaft Inspection | Download | |||
| ASB/SB | B-257.1 | 21/05/1993 | X | X | X | One-Time Inspection of Lower Coupling Driveshafts, and New Engine/Rotor Tachometer Markings | Download | |||
| ASB/SB | B-256.2 | 11/06/1993 | X | X | X | Inspection of Clutch Control Spring Assembly Installation | Download | |||
| ASB/SB | B-253 | 03/09/1993 | X | X | X | Tailboom Support Struts Corrosion Inspection | Download | |||
| ASB/SB | B-260 | 19/10/1994 | X | X | X | Corrosion Inspection and Treatment of Lower Coupling Drive Shaft | Download | |||
| ASB/SB | B-261 | 19/10/1994 | X | X | X | Periodic Inspection of Main Transmission Pinion Input Shaft Assembly | Download | |||
| ASB/SB | B-263 | 24/05/1995 | X | X | X | Inspection of Aft Cluster Fittings | Download | |||
| ASB/SB | DB-003 | 29/01/1997 | X | One-Time Inspection of Tail Rotor Blades | Download | |||||
| ASB/SB | B-259.2 | 02/11/1998 | X | X | X | 50-Hour Inspection of Main Rotor Blade Abrasion Strip | Download | |||
| ASB/SB | B-265.1 | 23/07/1996 | X | X | X | 269A6050-005 LTS Tail Rotor Pitch Control Assembly, Torque Verification of 269A6258 Nut, and Application of Torque Stripes | Download | |||
| ASB/SB | DB-002.1 | 23/07/1996 | X | 269A6050-005 Tail Rotor Pitch Control Assembly, Torque Verification of 269A6258 Nut, and Application Of Torque Stripes | Download | |||||
| ASB/SB | B-266 | 15/10/1996 | X | X | X | Textron Lycoming Service Bulletin No. 525 | Download | |||
| ASB/SB | C1B-004 | 24/07/1997 | X | Textron Lycoming Service Bulletin No. 527C | Download | |||||
| ASB/SB | C1B-006 | 20/03/1998 | X | Inspection of Main Transmission Pinion Splines; New Torque Check Requirement for Aft Pinion Nut | Download | |||||
| ASB/SB | B-244.3 | 06/04/1998 | X | X | X | Possible Deterioration of Certain Main Transmission Pinion Assembly Teeth and Ring Gear Teeth | Download | |||
| ASB/SB | C1B-007 | 14/07/1998 | X | One-Time Inspection of Main Rotor Hub and Shaft, and New Assembly Procedure | Download | |||||
| ASB/SB | C1B-005.1 | 14/07/1998 | X | Primer Hose Replacement | Download | |||||
| ASB/SB | DB-005 | 24/07/1998 | X | Replacement of Main Rotor Hub Hoisting Eye | Download | |||||
| ASB/SB | DB-004.3 | 03/11/1998 | X | Main Rotor Hub and Shaft Inspection and New Assembly Procedure | Download | |||||
| ASB/SB | N-188.4 | 12/02/1999 | X | X | X | Installation of New Higher Strength Tail Rotor Blade Retention Bolt P/N LWB22-6-22, LWB22D-6-22 or HS4441-6-22; and Inspection of Tail Rotor Blade Attachment Bushing Holes | Download | |||
| ASB/SB | DB-007.1 | 14/10/1999 | X | Tail Rotor Swashplate Shaft Inspection | Download | |||||
| ASB/SB | DB-008 | 18/02/2000 | X | Inspection/Replacement Criteria for Certain Upper H-Frame Bearings (Schweizer P/N 269A5050-78) | Download | |||||
| ASB/SB | B-273 | 23/08/2000 | X | X | X | Replacement of Shoulder Harness and Inertia Reel Assembly | Download | |||
| ASB/SB | B-274 | 02/01/2001 | X | X | X | Textron Lycoming Special Advisory No. 63-1200 | Download | |||
| ASB/SB | C1B-011 | 02/01/2001 | X | Textron Lycoming Special Advisory No. 62-1200 | Download | |||||
| ASB/SB | B-270.2 | 12/03/2001 | X | X | X | Inspection of 269A5104-007 Main Transmission Ring Gears with Specific Serial Numbers and Reporting of Inspection Results | Download | |||
| ASB/SB | DB-006.1 | 08/01/2001 | X | Inspection of 269A5104-007 Main Transmission Ring Gears with Specific Serial Numbers and Reporting Inspection Results | Download | |||||
| ASB/SB | C1B-012 | 12/03/2001 | X | One-Time Inspection for Condition and Modification of Certain Idler Pulley Support Assemblies | Download | |||||
| ASB/SB | DB-009 | 28/09/2001 | X | Replacement of Forward and Aft Kaflex Drive Shaft Coupling Bolts | Download | |||||
| ASB/SB | C1B-013.1 | 14/11/2001 | X | Main Rotor Swashplate Bearings P/N 269A1301 | Download | |||||
| ASB/SB | B-277 | 25/01/2002 | X | X | X | One-Time Inspection of Certain 269A2234-3 (LH) and 269A2235-3 (RH) Aft Cluster Fittings | Download | |||
| ASB/SB | DB-013 | 26/04/2005 | X | Fuel Pump Drain Tube | Download | |||||
| ASB/SB | DB-014.2 | 19/04/2006 | X | Modification of Locknut/Hoist Eye Assembly | Download | |||||
| ASB/SB | DB-015.1 | 19/04/2006 | X | Modification of CEF 8618M33 Linear Actuator | Download | |||||
| ASB/SB | B-284.1 | 18/09/2006 | X | X | X | Modification of 269A4564-5 and -7 Linear Actuators | Download | |||
| ASB/SB | C1B-014 | 09/08/2002 | X | One-time Inspection of 269A2172-5 Aft Mast Support Tube Forward Fitting | Download | |||||
| ASB/SB | B-278 | 06/09/2002 | X | X | X | 269A2234 BSC and 269A2235 BSC Aft Cluster Fitting Modification | Download | |||
| ASB/SB | B-269.1 | 26/12/2002 | X | X | X | Replacement of Old Style Tail Rotor Drive Fork Hinge Bolt and Clarification of Torque Value | Download | |||
| ASB/SB | DB-011.1 | 20/03/2003 | X | Horizontal Stabilizer, Inspection of End Plate and Attachment | Download | |||||
| ASB/SB | N-121.2 | 10/04/2003 | X | X | X | Inspection and Rework Tail Rotor Control System, Rudder Pedal Installation | Download | |||
| ASB/SB | B-281 | 05/09/2003 | X | X | X | Throttle Governor Bellcrank | Download | |||
| ASB/SB | C1B-015 | 04/11/2003 | X | Modification of 269A5590-1 Clutch Spring Assembly | Download | |||||
| ASB/SB | B-280.1 | 06/04/2004 | X | X | X | Modification of 269A5590-1, and 269A5483-1/-3 Clutch Spring Assemblies | Download | |||
| ASB/SB | B-282.1 | 24/09/2004 | X | X | X | Support Bracket (269A8460-3) Throttle Bellcrank, Inspection for Cracks | Download | |||
| ASB/SB | C1B-016.1 | 24/09/2004 | X | Support Bracket (269A8460-1) Throttle Bellcrank, Inspection for Cracks | Download | |||||
| ASB/SB | C1B-017.1 | 04/03/2005 | X | Inspection and Modification of 269A7316-13 Lateral Control Trim Assembly | Download | |||||
| ASB/SB | C1B-019.1 | 29/01/2007 | X | Tail Rotor Swashplate Bellcrank Assembly Safety Washer Installation | Download | |||||
| ASB/SB | DB-017 | 13/11/2006 | X | Installation of Latch Assy. Fuel Cell Cover Kit | Download | |||||
| ASB/SB | C1B-020 | 29/11/2006 | X | Slick Service Bulletin SB1-06A | Download | |||||
| ASB/SB | DB-021 | 24/10/2007 | X | Restrictions in Rolls-Royce Turbine Engine Operation | Download | |||||
| ASB/SB | DB-020 | 01/11/2007 | X | Alignment Inspection - KAFLEX Shaft to Engine Output Shaft | Download | |||||
| ASB/SB | DB-022 | 12/11/2007 | X | Inspection of Tail Rotor Pedal Attachment Structure and Installation of Tail Rotor Pedal Attachment Reinforcement Kit | Download | |||||
| ASB/SB | DB-018.3 | 13/12/2007 | X | Inspection for Fatigue Cracking in 269D3300-1 Aft Fuselage Assemblies and Installation of Stabilizer Mount Doublers | Download | |||||
| ASB/SB | DB-023.1 | 21/04/2008 | X | Tail Rotor Drive Shaft Splined Fittings Inspection | Download | |||||
| ASB/SB | C1B-023 | 28/04/2008 | X | Reprint of Precision Airmotive Mandatory Service Bulletin | Download | |||||
| ASB/SB | DB-024.1 | 26/09/2008 | X | Installation of Single Wheel Ground Handling Wheel Locking Device | Download | |||||
| ASB/SB | DB-025 | 26/09/2008 | X | Landing Gear Skid Tube Aft Sleeve Inspection | Download | |||||
| ASB/SB | C1B-027 | 03/10/2008 | X | Fuel Strainer Leak Check | Download | |||||
| ASB/SB | DB-026 | 08/12/2008 | X | Modification of Cabin Door Hinges | Download | |||||
| ASB/SB | C1B-024.1 | 24/11/2008 | X | Throttle Control Restriction | Download | |||||
| ASB/SB | C1B-029 | 09/01/2009 | X | Incorrect Grease Identification in Certain Serial Number Helicopters | Download | |||||
| ASB/SB | DB-029 | 13/02/2009 | X | Longitudinal Trim Assembly Spring Attachment | Download | |||||
| ASB/SB | DB-027.2 | 01/09/2009 | X | Inspection of Engine-Transmission Oil Cooler Impeller | Download | |||||
| ASB/SB | DB-031 | 01/09/2009 | X | Oil Cooler Impeller Blade Containment Kit | Download | |||||
| ASB/SB | DB-019.1 | 24/08/2010 | X | Main Transmission Input Pinion Corrosion Protection | Download | |||||
| ASB/SB | B-294 | 24/08/2010 | X | X | X | Incorrect Bushing used in 269C Flight Controls | Download | |||
| ASB/SB | C1B-030 | 24/08/2010 | X | Center Control Cover Contacting Lateral Cyclic Control Rod | Download | |||||
| ASB/SB | C1B-031 | 24/08/2010 | X | Incorrect Bushing used in 269C-1 Flight Controls | Download | |||||
| ASB/SB | C1B-033 | 05/01/2011 | X | Clevis Pin Chaffing Bottom of Fuel Tank | Download | |||||
| ASB/SB | DB-034 | 09/05/2011 | X | 269D1120 Main Rotor Blade Paint Separation | Download | |||||
| ASB/SB | DB-037.1 | 13/12/2011 | X | Inspection of Main Rotor Drive Thrust Bearing Journal Radius | Download | |||||
| ASB/SB | C1B-035 | 04/01/2012 | X | POWERTRAIN: One-Time Inspection of Belt Drive Idler Pulley Hardware for Presence and_x000D_Security | Download | |||||
| ASB/SB | DB-041.1 | 24/02/2012 | X | DRIVE TRAIN - Tail Rotor Drive Shaft Splined Fittings ? Perform a One-Time Inspection and_x000D_ Implement a Recurring Inspection for Wear | Download | |||||
| ASB/SB | B-295.1 | 28/02/2012 | X | X | X | Inspection and Modification of Tail Boom Support Strut Adjustable Diameter Bolt | Download | |||
| ASB/SB | C1B-032.1 | 28/02/2012 | X | Inspection and Modification of Tailboom Support Strut Adjustable Diameter Bolt | Download | |||||
| ASB/SB | B-300 | 18/04/2012 | X | X | X | One-Time Inspection to Remove from Service Engine and/or Rotor Tachometer Cables with_x000D_a Hexagonal Connector on One End. | Download | |||
| ASB/SB | C1B-037 | 18/04/2012 | X | One-Time Inspection to Remove from Service Engine and/or Rotor Tachometer Cables with_x000D_a Hexagonal Connector on One End | Download | |||||
| ASB/SB | DB-043 | 26/04/2012 | X | ENGINE INSTALLATION ? Engine Alignment Adjustment ? Implement Recurring Engine_x000D_Alignment Checks | Download | |||||
| ASB/SB | DB-040A | 04/12/2012 | X | POWER TRAIN ? Ring Gear Carrier Assembly ? To Implement a Reduction in Service Life | Download | |||||
| ASB/SB | DB-050 | 02/05/2013 | X | One-Time Tail Rotor (T/R) Blade Borescope Inspection for Excess Primer | Download | |||||
| ASB/SB | C1B-039 | 02/05/2013 | X | One-Time Tail Rotor (T/R) Blade Borescope Inspection for Excess Primer_x000D_ | Download | |||||
| ASB/SB | DB-044 | 25/07/2013 | X | X | X | X | X | One-Time Engine Alignment Check and Inspection of the KAflex? Drive Shaft, KAflex Coupling Assembly, and Engine Mount Assembly Absorbers | Download | |
| ASB/SB | DB-046 | 13/08/2013 | X | X | X | One-Time Visual Inspection of Main Rotor (M/R) Blade Assemblies and Implement a Recurring Visual Inspection for Cracks | Download | |||
| ASB/SB | DB-052 | 16/01/2014 | X | X | Reduction in service life of KAflex? Drive Shaft and Coupling Assembly (269D Configuration "A") and (269D). Implement a new 1200 Hour Overhaul Inspection of the KAflex Drive Shaft and Coupling Assembly | Download | ||||
| ASB/SB | DB-054 | 01/04/2014 | X | X | KAflex Drive Shaft and Coupling Assembly Service Life Expiration | Download | ||||
| ASB/SB | DB-057 | 15/04/2014 | X | X | X | X | X | X | One-Time Load/Stroke Inspection of Landing Gear Dampers to be Performed at an Overhaul or Repair Facility | Download |
| ASB/SB | DB-060 | 21/11/2014 | X | X | One-Time Inspection of Tail Rotor Flight Control Cables, Pulleys, and Forward and Aft Bellcranks for Damage and/or Wear, and Verification of Parts Configuration | Download | ||||
| ASB/SB | C1B-043A | 18/12/2014 | X | POWER TRAIN - Lower Coupling Drive Shaft - One-Time Inspection of Lower Coupling Drive Shaft and Shaft Assembly | Download | |||||
| ASB/SB | B-308A | 04/08/2015 | X | X | X | MAIN ROTOR AND CONTROL SYSTEM - Pilot's Collective Pitch Control Stick - One-Time Inspection of Collective Pitch Control Torque Tube | Download | |||
| ASB/SB | C1B-040 | 30/06/2015 | X | POWER TRAIN - Belt Drive Transmission Assembly - One-Time Inspection of the Belt Drive Transmission Upper Pulley Installation for Correct Torque, Parts Configuration and Stack-up, Damage and/or Wear | Download | |||||
| ASB/SB | B-305 | 30/06/2015 | X | X | X | POWER TRAIN - Belt Drive Transmission Assembly - One-Time Inspection of the Belt Drive Transmission Upper Pulley Installation for Aft Pinion Nut Torque, Parts Configuration and Stack-up, Damage and/or Wear | Download | |||
| ASB/SB | DB-058 | 30/06/2015 | X | X | POWER TRAIN SYSTEM - Belt Drive Transmission Assembly - One-Time Inspection of the Belt Drive Transmission Upper Pulley Installation for Aft Pinion Nut Torque, Parts Configuration and Stack-up, Damage and/or Wear | Download | ||||
| ASB/SB | B-307A | 26/08/2015 | X | X | X | POWER TRAIN – Lower Coupling Drive Shaft – One-Time Inspection of Lower Coupling Drive Shaft and Shaft Assembly | Download | |||
| ASB/SB | C1B-045 | 29/02/2016 | X | POWER TRAIN – Belt Drive Clutch Control Installation – One-Time Inspection of Cable Pulley Bracket | Download | |||||
| ASB/SB | DB-062 | 03/03/2016 | X | X | MAIN ROTOR AND CONTROL SYSTEM AND TAIL ROTOR AND CONTROL SYSTEM – Main Rotor and Tail Rotor Control Rods – One-time Inspection of Flight Control Pushrods with Adjustable Rod Ends | Download | ||||
| ASB/SB | DB-064 | 06/05/2016 | X | X | POWER TRAIN SYSTEM – KAflex® Driveshaft – KAflex Driveshaft Reduction in Service Life | Download | ||||
| ASB/SB | B-311 | 30/06/2016 | X | X | X | CABIN AND CENTER FRAME SECTION-Cabin Doors - One-time Inspection of Airframe and Door Mounted Hinge Halves for Proper Sizing and Plunger Pin to Lug Engagement | Download | |||
| ASB/SB | C1B-047 | 30/06/2016 | X | X | X | X | X | X | CABIN AND CENTER FRAME SECTION-Cabin Doors-One-time Inspection of Airframe and Door Mounted Hinge-Halves for Proper Sizing and Plunger Pin to Lug Engagement | Download |
| ASB/SB | DB-066 | 30/06/2016 | X | X | CABIN AND CENTER FRAME SECTION – Cabin Doors – One-time Inspection of Airframe and Door Mounted Hinge-Halves for Proper Sizing and Plunger Pin to Lug Engagement | Download | ||||
| ASB/SB | DB-070 | 16/03/2017 | X | X | POWER TRAIN SYSTEM – KAflex® Driveshaft – One-Time Inspection of KAflex® Assemblies for Axial Play and Installation of Bolt (NAS6605-25) | Download | ||||
| ASB/SB | DB-068 | 17/03/2017 | X | X | ENGINE CONTROL SYSTEM – Adjustment of Power Controls – Revise N2 Restrictions for Rolls-Royce® Turbine Engine Operation and Installation of Engine N2 Avoidance Placard | Download | ||||
| ASB/SB | DB-072 | 03/10/2017 | X | X | POWER TRAIN SYSTEM – Kaflex® Drive Shaft – One-Time Inspection for the Correct Bolt that Attaches the Drive Adapter to KAflex® Assembly | Download | ||||
| ASB/SB | DB-040A MASTER | 04/12/2012 | X | X | X | ALERT SERVICE BULLETIN NO. DB-040A – POWER TRAIN – Ring Gear Carrier Assembly – To Implement a Reduction in Service Life | Download | |||
| ASB/SB | DB-001-1 | 28/09/1995 | X | X | X | 50-Hour Inspection Of Main Rotor Blade Ambrasion Strip | Download | |||
| ASB/SB | DB-035 | 09/05/2021 | X | X | X | 269D1120 Main Rotor Blade Paint Separation | Download | |||
| ASB/SB | DB-037.1 | 12/12/2011 | X | X | X | SERVICE BULLETIN No. DB-037.1 - Inspection of Main Rotor Drive Thrust Bearing Journal Radius | Download | |||
| ASB/SB | DB-038.1 | 12/12/2011 | X | X | X | SERVICE BULLETIN No. DB-038.1 - Inspection of Main Rotor Drive Thrust Bearing Journal Radius | Download | |||
| ASB/SB | DB-039 | 04/01/2012 | X | X | X | POWERTRAIN: One-Time Inspection of Belt Drive Idler Pulley Hardware for Presence and Security | Download | |||
| ASB/SB | DB-041 | 12/02/2024 | X | X | X | ALERT SERVICE BULLETIN No. DB-041.1 - Tail Rotor Drive Shaft Splined Fittings – Perform a One-Time Inspection and Implement a Recurring Inspection for Wear. | Download | |||
| ASB/SB | DB-042 | 13/02/2024 | X | X | X | DRIVE TRAIN - Tail Rotor Drive Shaft Splined Fittings – Perform a One-Time Inspection and Implement a Recurring Inspection for Wear | Download | |||
| ASB/SB | DB-045 | 25/07/2013 | X | X | X | One-Time Engine Alignment Check and Inspection of the KAflex® Drive Shaft, KAflex Coupling Assembly, and Engine Mount Assembly Absorbers | Download | |||
| ASB/SB | DB-055 | 14/12/2015 | X | X | X | Download | ||||
| ASB/SB | DB-056 | 15/04/2014 | X | X | X | One-Time Load/Stroke Inspection of Landing Gear Dampers to be Performed at an Overhaul or Repair Facility | Download | |||
| ASB/SB | DB-059 | 30/06/2015 | X | X | X | POWER TRAIN SYSTEM – Belt Drive Transmission Assembly – One-Time Inspection of the Belt Drive Transmission Upper Pulley Installation for Aft Pinion Nut Torque, Parts Configuration and Stack-up, Damage and/or Wear | Download |