| Doc Number | Date | Model | Subject |
|---|---|---|---|
| B-233 | 10-02-1992 | 269C | One Time Inspection - Engine Oil Cooler |
| B-234 | 16-12-1991 | 269B and 269C | Inspection and Modification of Longitudinal Trim Mounting Plate and Trim Arm Stop |
| B-235.1 | 20-03-1992 | 269A, 269B and 269C | Possible Restriction of Throttle Controls |
| B-236 | 04-07-1991 | 269C | Inspection of Low Tip Speed Tail Rotor Swashplate Bellcrank Assembly Hole |
| B-237.1 | 30-05-1991 | 269C | Possible Restriction of Cyclic Pitch Control |
| B-240 | 08-05-1992 | 269C | One Time Inspection - Thrust Bearing Nut P/N 269A1315 With Possible Incomplete Threads |
| B-241 | 10-02-1992 | All 269 Series | Inspection of Seat Belt Snap Hook End Fittings |
| B-242 | 10-02-1992 | All 269 Series | One Time Inspection of Main Rotor Blades |
| B-243 | 08-05-1992 | All 269 Series | Corrosion Damage Inspection of Main Rotor Drive Shaft P/N 269A5305 |
| B-244.3 | 06-04-1998 | 269A, TH-55A, 269A-1, 269B and 269C | Possible Deterioration of Certain Main Transmission Pinion Assembly Teeth and Ring Gear Teeth |
| B-245 | 08-05-1992 | 269A/TH-55A | Maintenance and Operation Requirements for Safe Operation of Surplus TH-55A Helicopters |
| B-247 | 30-10-1992 | 269A, TH-55A, 269A-1, 269B and 269C | Tail Rotor Pedal Bulkhead (Floor Beam) Gusset |
| B-248 | 07-11-1991 | 269C | 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 Supp. 1 |
| B-249 | 20-03-1992 | 269C | One-Time Inspection of Throttle Override Bellcrank Assembly |
| B-250 | 20-03-1992 | 269C | Triple-Latch Door - Lower Latch Bolt and Collective Friction Guide Assembly Interference |
| B-251 | 20-03-1992 | 269A, 269A-1, 269B, TH-55A and 269C | Inspection of Clutch Cable Assembly and Terminal End (P/N AN669L3RH or MS21260L3RH) |
| B-252 | 01-06-1992 | 269A, TH-55A, 269A-1, 269B and 269C (Fuel Injected) | Precision Airmotive Corporation Bulletins PRS-97 and PRS-98 |
| B-253 | 03-09-1993 | 269A, TH-55A, 269A-1, 269B and 269C | Tailboom Support Struts Corrosion Inspection |
| B-255.1 | 01-02-1993 | 269A, TH-55, 269A-1, 269B and 269C | Main Rotor Drive Shaft Inspection |
| B-256.2 | 11-06-1993 | 269A, TH-55A, 269A-1, 269B and 269C | Inspection of Clutch Control Spring Assembly Installation |
| B-257.1 | 21-05-1993 | 269A, TH-55A, 269A-1, 269B and 269C | One-Time Inspection of Lower Coupling Drive Shafts, and New Engine/Rotor Tachometer Markings |
| B-259.2 | 02-11-1998 | 269A, TH-55A, 269A-1, 269B and 269C | 50-Hour Inspection of Main Rotor Blade Abrasion Strip |
| B-260 | 19-10-1994 | 269A, TH-55A, 269A-1, 269B and 269C | Corrosion Inspection and Treatment of Lower Coupling Drive Shaft |
| B-263 | 24-05-1995 | 269A, TH-55A, 269A-1, 269B and 269C | Inspection of Aft Cluster Fittings |
| B-265.1 | 23-07-1996 | 269A, TH-55A, 269A-1, 269B and 269C | 269A6050-005 LTS Tail Rotor Pitch Control Assembly, Torque Verification of 269A6258 Nut, and Application of Torque Stripes |
| B-266 | 15-10-1996 | 269A, TH-55A, 269A-1, 269B and 269C | Textron Lycoming Service Bulletin No. 525 |
| B-269.1 | 26-12-2002 | 269A, TH-55A, 269A-1, 269B and 269C | Replacement of Old Style Tail Rotor Drive Fork Hinge Bolt and Clarification of Torque Value |
| B-270.2 | 12-03-2001 | 269A, TH-55A, 269A-1, 269B and 269C | Inspection of 269A5104-007 Main Transmission Ring Gears With Specific Serial Numbers and Reporting of Inspection Results |
| B-273 | 23-08-2000 | 269A, TH-55A, 269B and 269C | Replacement of Shoulder Harness and Inertia Reel Assembly |
| B-274 | 02-01-2001 | 269A, TH-55A, 269A-1, 269B and 269C | Textron Lycoming Special Advisory No. 63-1200 |
| B-277 | 25-01-2002 | 269A, TH-55A, 269A-1, 269B and 269C | One-Time Inspection of Certain 269A2234-3 (LH) and 269A2235-3 (RH) Aft Cluster Fittings |
| B-278 | 06-09-2002 | 269A, TH-55A, 269A-1, 269B and 269C | 269A2234 BSC and 269A2235 BSC Aft Cluster Fitting Modification |
| B-280.1 | 06-04-2004 | 269A, TH-55A, 269B and 269C | Modification of 269A5590-1, and 269A5483-1/-3 Clutch Spring Assemblies |
| B-281 | 05-09-2003 | 269C | Throttle Governor Bellcrank |
| B-282.1 | 24-09-2004 | 269C | Support Bracket (269A8460-3) Throttle Bellcrank, Inspection for Cracks |
| B-284.1 | 18-09-2006 | 269A, 269A-1, 269B, TH-55A and 269C | Modification of 269A4564-5 and -7 Linear Actuators |
| B-294 | 24-08-2010 | 269C | Incorrect Bushing Used in 269C Flight Controls |
| B-295.1 | 28-02-2012 | 269A, 269A-1, 269B and 269C | Inspection and Modification of Tailboom Support Strut Adjustable Diameter Bolt |
| B-300 | 18-04-2012 | 269A, 269B and 269C | One-Time Inspection to Remove From Service Engine and/or Rotor Tachometer Cables With a Hexagonal Connector on One End |
| B-305 | 30-06-2015 | 269A, TH-55A, 269A-1, 269B and 269C | 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 |
| B-307A | 26-08-2015 | 269A, TH-55A, 269A-1, 269B and 269C | Power Train - Lower Coupling Drive Shaft - One-Time Inspection of Lower Coupling Drive Shaft and Shaft Assembly |
| B-308A | 04-08-2015 | 269A, 269A-1, TH-55A, 269B and 269C | Main Rotor and Control System - Pilot's Collective Pitch Control Stick - One-Time Inspection of Collective Pitch Control Torque Tube |
| C1B-004 | 24-07-1997 | 269C-1 | Textron Lycoming Service Bulletin No. 527C |
| C1B-005.1 | 14-07-1998 | 269C-1 | Primer Hose Replacement |
| C1B-006 | 20-03-1998 | 269C-1 | Inspection of Main Transmission Pinion Splines; New Torque Check Requirement for Aft Pinion Nut |
| C1B-007 | 14-07-1998 | 269C-1 | One-Time Inspection of Main Rotor Hub and Shaft, and New Assembly Procedure |
| C1B-011 | 02-01-2001 | 269C-1 | Textron Lycoming Special Advisory No. 62-1200 |
| C1B-013.1 | 14-11-2001 | 269C-1 | Main Rotor Swashplate Bearings P/N 269A1301 |
| C1B-014 | 09-08-2002 | 269C-1 | One-Time Inspection of 269A2172-5 Aft Mast Support Tube Forward Fitting |
| C1B-015 | 04-11-2003 | 269C-1 | Modification of 269A5590-1 Clutch Spring Assembly |
| C1B-016.1 | 24-09-2004 | 269C-1 | Support Bracket (269A8460-1) Throttle Bellcrank, Inspection for Cracks |
| C1B-017.1 | 04-03-2005 | 269C-1 | Inspection and Modification of 269A7316-13 Lateral Control Trim Assembly |
| C1B-019.1 | 29-01-2007 | 269C-1 | Tail Rotor Swashplate Bellcrank Assembly Safety Washer Installation |
| C1B-020 | 29-11-2006 | 269C-1 | Slick Service Bulletin SB1-06A |
| C1B-023 | 28-04-2008 | 269C-1 | Reprint of Precision Airmotive Mandatory Service Bulletin |
| C1B-024.1 | 24-11-2008 | 269C-1 | Throttle Control Restriction |
| C1B-027 | 03-10-2008 | 269C-1 | Fuel Strainer Leak Check |
| C1B-030 | 24-08-2010 | 269C-1 | Center Control Cover Contacting Lateral Cyclic Control Rod |
| C1B-032.1 | 28-02-2012 | 269C-1 | Inspection and Modification of Tailboom Support Strut Adjustable Diameter Bolt |
| C1B-033 | 05-01-2011 | 269C-1 | Clevis Pin Chaffing Bottom of Fuel Tank |
| C1B-035 | 04-01-2012 | 269C-1 | Powertrain: One-Time Inspection of Belt Drive Idler Pulley Hardware for Presence and Security |
| C1B-037 | 18-04-2012 | 269C-1 | One-Time Inspection to Remove From Service Engine and/or Rotor Tachometer Cables With a Hexagonal Connector on One End |
| C1B-039 | 02-05-2013 | 269C-1 | One-Time Tail Rotor (T/R) Blade Borescope Inspection for Excess Primer |
| C1B-040 | 30-06-2015 | 269C-1 | 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 |
| C1B-043A | 26-08-2015 | 269C-1 | Power Train - Lower Coupling Drive Shaft - One-Time Inspection of Lower Coupling Drive Shaft and Shaft Assembly |
| C1B-045 | 29-02-2016 | 269C-1 | Power Train - Belt Drive Clutch Control Installation - One-Time Inspection of Cable Pulley Bracket |
| CSP-DP-2 | 23-01-2020 | 269D, 269D Config "A" (Schweizer 330 & 333) | Publications Index |
| CSP-P-1 | 23-01-2020 | 269A, TH-55A, A-1, B, C | Publications Index |
| CSP-P1-1 | 23-01-2020 | 269C-1 | Publications Index |
| DB-001.1 | 28-09-1995 | 269D | 50-Hour Inspection of Main Rotor Blade Abrasion Strip |
| DB-002.1 | 23-07-1996 | 269D | 269A6050-005 Tail Rotor Pitch Control Assembly, Torque Verification of 269A6258 Nut, and Application of Torque Stripes |
| DB-003 | 29-01-1997 | 269D | One-Time Inspection of Tail Rotor Blades |
| DB-004.3 | 03-11-1998 | 269D | Main Rotor Hub and Shaft Inspection and New Assembly Procedure |
| DB-005 | 24-07-1998 | 269D | Replacement of Main Rotor Hub Hoisting Eye |
| DB-006.1 | 08-01-2001 | 269D | Inspection of 269A5104-007 Main Transmission Ring Gears With Specific Serial Numbers and Reporting Inspection Results |
| DB-007.1 | 14-10-1999 | 269D | Tail Rotor Swashplate Shaft Inspection |
| DB-008 | 18-02-2000 | 269D | Inspection/Replacement Criteria for Certain Upper H-Frame Bearings (Schweizer P/N 269A5050-78) |
| DB-009 | 28-09-2001 | 269D and 269D Configuration "A" | Replacement of Forward and Aft Kaflex Drive Shaft Coupling Bolts |
| DB-013 | 26-04-2005 | 269D | Fuel Pump Drain Tube |
| DB-014.2 | 19-04-2006 | 269D | Modification of Locknut/Hoist Eye Assembly |
| DB-015.1 | 19-04-2006 | 269D and 269D Config. "A" | Modification of CEF 8618M33 Linear Actuator |
| DB-017 | 13-11-2006 | 269D | Installation of Latch Assy Fuel Cell Cover Kit |
| DB-018-3 | 13-12-2007 | 269D and 269D Config "A" | Inspection for Fatigue Cracking in 269D3300-1 Aft Fuselage Assemblies and Installation of Stabilizer Mount Doublers |
| DB-019-1 | 24-08-2010 | 269D | Main Transmission Input Pinion Corrosion Protection |
| DB-020 | 01-11-2007 | 269D and 269D Config "A" | Alignment Inspection - Kaflex Shaft to Engine Output Shaft |
| DB-021 | 24-10-2007 | 269D | Restrictions in Rolls-Royce Turbine Engine Operation |
| DB-022 | 12-11-2007 | 269D | Inspection of Tail Rotor Pedal Attachment Structure and Installation of Tail Rotor Pedal Attachment Reinforcement Kit |
| DB-023-1 | 21-04-2008 | 269D | Tail Rotor Drive Shaft Splined Fittings Inspection |
| DB-024-1 | 26-09-2008 | 269D | Installation of Single Wheel Ground Handling Wheel Locking Device |
| DB-025 | 26-09-2008 | 269D | Landing Gear Skid Tube Aft Sleeve Inspection |
| DB-026 | 24-10-2008 | 269D | Modification of Cabin Door Hinges |
| DB-027-2 | 01-09-2009 | 269D | Inspection of Engine/Transmission Oil Cooler Impeller |
| DB-029 | 13-02-2009 | 269D | Longitudinal Trim Assembly Spring Attachment |
| DB-034 | 09-05-2011 | 269D Config "A" (S-333) | 269D1120 Main Rotor Blade Paint Separation |
| DB-035 | 09-05-2011 | 269D Config "M" (S-333M) | 269D1120 Main Rotor Blade Paint Separation |
| DB-037.1 | 12-12-2011 | 269D | Inspection of Main Rotor Drive Thrust Bearing Journal Radius |
| DB-038.1 | 12-12-2011 | 269D Config "M" and "MB" | Inspection of Main Rotor Drive Thrust Bearing Journal Radius |
| DB-039 | 04-01-2012 | 269D Config "M" and "MB" | One-Time Inspection of Belt Drive Idler Pulley Hardware for Presence and Security |
| DB-040A | 04-12-2012 | 269D | Power Train - Ring Gear Carrier Assembly - To Implement a Reduction in Service Life |
| DB-041.1 | 24-02-2012 | 269D | Drive Train - Tail Rotor Drive Shaft Splined Fittings - Perform a One-Time Inspection and Implement a Recurring Inspection for Wear |
| DB-042 | 13-02-2012 | 269D Config "M" and "MB"; SHU-40A and SHU-40B | Drive Train - Tail Rotor Drive Shaft Splined Fittings - Perform a One-Time Inspection and Implement a Recurring Inspection for Wear |
| DB-043 | 26-04-2012 | 269D | Engine Installation - Engine Alignment Adjustment - Implement Recurring Engine Alignment Checks |
| DB-044 | 25-07-2013 | 269D and 269D Config "A" | One-Time Engine Alignment Check and Inspection of the KAflex Drive Shaft, KAflex Coupling Assembly, and Engine Mount Assembly Absorbers |
| DB-045 | 25-07-2013 | 269D Config "M" and "MB" | One-Time Engine Alignment Check and Inspection of the KAflex Drive Shaft, KAflex Coupling Assembly, and Engine Mount Assembly Absorbers |
| DB-046 | 13-08-2013 | 269D Config "A" | One-Time Visual Inspection of Main Rotor Blade Assemblies and Implement a Recurring Visual Inspection for Cracks and/or Any Other Anomalies |
| DB-050 | 02-05-2013 | 269D | One-Time Tail Rotor Blade Inspection for Excess Primer |
| DB-054A | 14-12-2015 | 269DTM | KAflex® Drive Shaft and Coupling Assembly Service Life Expiration |
| DB-055A | 14-12-2015 | 269DTM | KAflex® Drive Shaft and Coupling Assembly Service Life Expiration |
| DB-056 | 15-04-2014 | 269D and 269D Config "A" | One-Time Load/Stroke Inspection of Landing Gear Dampers to be Performed at an Overhaul or Repair Facility |
| DB-057 | 15-04-2014 | 269D Config "M" and "MB" | One-Time Load/Stroke Inspection of Landing Gear Dampers to be Performed at an Overhaul or Repair Facility |
| DB-058 | 30-06-2015 | 269D and 269D Config "A" | 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 |
| DB-059 | 30-06-2015 | 269D Config "M" | 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 |
| DB-060 | 21-11-2014 | 269D and 269D Config "A" | One-Time Inspection of Tail Rotor Flight Control Cables, Pulleys, and Forward and Aft Bellcranks for Damage and/or Wear |
| DB-062 | 03-03-2016 | 269D and 269D Config "A" | Inspection of Flight Control Pushrods with Adjustable Rod Ends for Proper Jam-Nut Torque and Rod-End Threading |
| DB-064 | 06-05-2016 | 269D and 269D Config "A" | Power Train System - KAflex Driveshaft - KAflex Driveshaft Reduction in Service Life |
| DB-066 | 30-06-2016 | 269D and 269D Config "A" | 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 |
| DB-068 | 17-03-2017 | 269D and 269D Config "A" | Engine Control System - Adjustment of Power Controls - Revise N2 Restrictions for Rolls-Royce Turbine Engine Operation and Installation of Engine N2 Avoidance Placard |
| DB-070 | 16-03-2017 | 269D and 269D Config "A" | Power Train System - KAflex Driveshaft - One-Time Inspection of KAflex Assemblies for Axial Play and Installation of Bolt (NAS6605-25) |
| DB-072 | 03-10-2017 | 269D and 269D Config "A" | Power Train System - KAflex Drive Shaft - One-Time Inspection for the Correct Bolt that Attaches the Drive Adapter to KAflex Assembly |
| DL-001 | 23-09-1998 | 269D | Modification of Aircraft Parts Corporation Starter/Generator |
| DL-002 | 06-07-1999 | 269D/330SP | New Splined Main Rotor Hub and Drive Shaft Design with Increased Time Life |
| DL-003 | 06-07-1999 | 269D/330 | New Design Main Rotor Drive Shaft Thrust Bearing |
| DL-004 | 02-09-1999 | 269D | Compliance with Airworthiness Directive 99-17-10 |
| DL-005 | 02-05-2000 | Model 330 | Interface and Programming of the GPS150/150XL to Display Shadin Fuel Flow Data on the GPS |
| DL-006 | 11-08-2000 | 269D/330 | Modification Kit for 269D/330 Start/Generator Electrical System |
| DL-007 | 10-11-2000 | 269D | Orientation of Main Rotor Transmission Backlash Shim |
| DL-008 | 01-12-2000 | 269D | Introduction of New 269A5175-39 Main Rotor Transmission Assembly |
| DL-009 | 25-01-2002 | 269D | New Design - Tail Rotor Drive Shaft |
| DL-010 | 01-03-2006 | 269D | Exchange Program for CEF Industries 8618M33 N2 Trim Actuator |
| DL-011 | 21-07-2006 | 269D Conf. "A" | Introduction of New Main Rotor Transmission Assembly and Belt Drive Transmission Assembly Containing an Extended Hub Upper Pulley Assembly |
| DL-012 | 08-12-2008 | 269D | Structural Enhancement of Tail Rotor Pedal Mount |
| DL-013 | 11-06-2009 | 269D | Engine/Transmission Oil Cooler Impellers |
| DL-014 | 13-11-2009 | 269D Series | C20W Fuel Pump Bypass Check |
| DL-015 | 11-03-2010 | 269 Series | Technical Publications - Policy & Price Changes, 2010 |
| DL-016 | 11-03-2010 | 269 Series | 2010 Publications Schedule |
| DL-017 | 16-07-2010 | 269D/330 | Limited Time Upgrade Offer |
| DL-019 | 21-09-2011 | 269D and 269D Config "A" | Main Transmission Ring Gear Carrier Assembly - Request for Information |
| DL-020 | 04-01-2012 | 269D | 269 Series Service Bulletins, Service Letters and Temporary Revisions |
| L-1 | 08-06-1966 | 269A, TH-55A, 269A-1 and 269B | Input Spline Coupling P/N 5607 Time Increase - Tail Rotor Transmission |
| L-10 | 07-11-1966 | 269A-1 and 269B (Flotation Gear Equipped) | Pressure Variation With Temperature - Amphibious Float Landing Gear |
| L-101 | 01-08-1979 | 269A, 269A-1, 269B, 269C, TH-55A | Limited Life Increase for PN 269A5050-63 and 269A5050-73 Main Rotor Thrust Bearings; Unlimited Service Life for PN 369A5408 Series Tail Rotor Transmission (LTS) Output Shaft |
| L-102 | 28-09-1979 | 269C | New PN 269A8251 Heat Insulation Kit for Model 269C Engine Exhaust System |
| L-103 | 27-08-1979 | 269 Series | Main Transmission Input Pinion Shaft, PN 269A5103 and PN 269A5103-9 - Limited Life Increased to 6000 Hours |
| L-104 | 28-09-1979 | 269C | Installation of Engine Exhaust Collector Required for 2050 Lb Gross Helicopter Operation |
| L-105 | 19-11-1979 | TH-55A, 269A, 269B, 269C | Belt Drive Transmission, PN 269A5559-3 Coupling Shaft - Limited Life Increased to 6000 Hours |
| L-106.1 | 01-02-1982 | 269 Series | Drive System Rotating Bearings - Daily Purge with Mobil 28 Grease |
| L-107 | 10-12-1979 | 269C | New Comfort Clips for Sam Browne Seat Belt and Shoulder Harness Assemblies |
| L-108 | 01-01-1980 | 269 Series | New Wedge Base Lamp Socket, PN 2973932, for Both Instrument Cluster Assemblies |
| L-109 | 24-03-1980 | 269 Series | Bushing Requirement for 269A2324-7 Tailboom Center Support (Saddle) Fitting Installation |
| L-11 | 01-12-1966 | 269A-2 and 269B | Intake Pipe Replacement Per Avco - Lycoming Division Service Instruction No. 1162, Dated September 16, 1966 |
| L-110.1 | 19-11-1982 | 269A (TH-55A), 269C | 24V Battery Relay, PN MS24166D1 - Corrosion Protection and Relay Replacement |
| L-112 | 09-06-1980 | 269 Series | Periodic Cleaning and Lubrication of Sealed Bearings - Upper Pulley, Lower Coupling Drive Pulley, Idler Pulley and Main Rotor Drive Shaft Thrust Bearing |
| L-113.6 | 12-02-1985 | 269 Series | Exchange Program - Selected Helicopter Components |
| L-114.2 | 15-02-1983 | 269 Series | New Belt Drive H-Frame with PN 269A5050-78 Upper Pulley Bearing Having Service Life of 3000 Hours |
| L-115 | 30-09-1980 | 269 Series | Compliance with FAA Airworthiness Directives and Hughes Mandatory (Red Border) Service Information Notices |
| L-117.1 | 21-07-1981 | 269 Series | Periodic Inspection and Replacement - Main Rotor Hub Attaching Bolts, PN 269A1229 and 269A1232 |
| L-119.1 | 02-11-1981 | 269 Series | Aeroshell 14 Grease Only Approved Lubricant for Rotor System Oscillating Bearings |
| L-12 | 05-12-1966 | 269A, TH-55A and 269A-1 | Interim Revision - HMI Re: Main and Tail Rotor Overspeed Criteria |
| L-120 | 31-07-1981 | 269 Series | Ground Handling Precautions for Main Rotor Systems Equipped with Elastomeric Dampers |
| L-121 | 21-08-1981 | 269 Series | Corrosion Control Manual Now Available for General Distribution and Purchase |
| L-123 | 01-09-1981 | 269 Series | New Protective Boot for 269A6034 Series LTS Tail Rotor Assembly |
| L-124 | 01-09-1981 | 269 Series | Torque Value Established for PN 269A5714 Tail Rotor Drive Shaft Forward Retaining Nut |
| L-125 | 01-10-1981 | 269 Series | New PN 269A5498-5 Lower Coupling Pulley Drive Shaft Provided as Replacement for PN 269A5498 and PN 269A5498-3 Drive Shafts |
| L-126.1 | 01-09-1982 | 269 Series | Summary of FAA Supplemental Type Certificates for Hughes Model 269 Series Helicopters |
| L-127.1 | 09-04-1982 | 269C | Unlimited Service Life PN 269A5430 and 269A5430-1 Driving Spline Fitting and 269A6030 Driven Spline and Inspection Criteria |
| L-129 | 15-02-1982 | 269 Series | PN 269A5050-74 Idler Pulley Bearing and PN 269A5050-78 Belt Drive H-Frame Upper Bearing - Service Life Increased to 3000 Hours |
| L-13 | 11-01-1967 | All 269 Series | Interim Revision - HMI Re: Limited Life and Component Overhaul List |
| L-130 | 26-03-1982 | 269C | New PN 269A3150-9 Aft Landing Gear Damper Assemblies Increase Static Height of Tail Skid for 269C Helicopters Operating in Cold Weather or with Increased Gross Weight |
| L-131.1 | 01-02-1984 | 269 Series | Distribution and Shipment of Schweizer-Hughes Model 300 Publications |
| L-132 | 24-11-1982 | 269A, TH-55A, 269A-1 and 269B | New Tailboom Assembly, PN 269A2320-9 |
| L-133 | 27-02-1984 | 269 Series | Unauthorized Tail Boom Assemblies for 269 Series Helicopters |
| L-137 | 11-02-1986 | 269 Series | Replacement of Aircraft Identification Plates |
| L-138 | 11-02-1986 | 269 Series | Service Life Cutoff Limit |
| L-139 | 02-01-1987 | 269 Series | Cleaning of Elastomeric Dampers |
| L-14 | 20-02-1967 | 269A, TH-55A, 269A-1 and 269B | Interim Revision - HMI Re: Inspection - Sudden Stoppage Drive System |
| L-140 | 02-01-1987 | 269 Series | Proper Operation of Trim Controls |
| L-141 | 02-01-1987 | 269 Series | Explanation of Temporary Revision System |
| L-142 | 02-01-1987 | 269 Series | Life Limit Update |
| L-143 | 02-01-1987 | 269 Series | Overhaul Schedule Update |
| L-144 | 29-09-1987 | 269 Series | Break-Away Torque Increase - MR Pitch Bearing Assembly |
| L-145 | 10-03-1988 | 269 Series | Company Policy - Unapproved Parts |
| L-146 | 01-09-1987 | 269 Series | Avco Lycoming Service Bulletins: No. 454B - Replacement of Oil Pump Impellers; No. 456C - Replacement of Oil Pump Impellers; No. 477A - Inspection and Rework of P/N LW-18790 Rocker Arm Assembly |
| L-147 | 15-12-1987 | 269 Series | Publications Index - Major Change in Scope and Revision Process |
| L-148 | 01-02-1989 | 269 Series | Avco Lycoming Service Instructions No. 1014K and 1409A |
| L-149 | 24-08-1990 | 269 Series | Changes to Notice and Letter Nomenclature |
| L-15.1 | 21-02-1967 | All Model Helicopters | Definition - Limited Life Parts |
| L-150.2 | 24-07-1996 | 269A, TH-55A, 269A1, 269B, 269C | New Belt Drive Transmission "H" Frame |
| L-151 | 05-10-1990 | 269 Series | Corrections to 269 Notice and Letter Set (Printing Errors) |
| L-152 | 07-11-1991 | 269 Series | New Part Numbers for Tail Rotor Transmission Assembly |
| L-153 | 07-11-1991 | 269A, TH-55A, 269A1, 269B, 269C | Extended Warranty Policy for Pinion and Ring Gears Installed in Main Rotor Transmissions Affected by Service Bulletin B-244 |
| L-154 | 08-05-1992 | 269 Series | Service Facilities for Corrosion Damage Inspection and Repair of the Main Rotor Driveshaft Part Number 269A5305 (Reference Service Bulletin B-243) |
| L-155 | 29-04-1993 | 269A, TH-55A, 269A1, 269B, 269C | Main Rotor Rod End Bearings and Lead-Lag Bushings |
| L-156 | 29-04-1993 | 269C | New Improved Landing Gear Dampers |
| L-157 | 29-04-1993 | 269A, TH-55A, 269A1, 269B, 269C | Overhaul Kits for Fuel Shut-Off and Drain Valves |
| L-158 | 29-04-1993 | 269A, TH-55A, 269A1, 269B, 269C | Improper Maintenance Procedures in Installation of the 269A2324 Series Tail Boom Support Fitting (Saddle Fitting) Which Results in a Hazardous Flight Condition |
| L-159 | 30-04-1995 | 269A, TH-55A, 269A-1, 269B, 269C | Additional Lubricants for Lower Coupling Drive Shaft |
| L-16 | 23-08-1967 | 269A (S/N 0011 and subsequent, Config C or D), 269A-1, 269A-2 and 269B | Interim Revision - HMI Re: Maintenance Instructions for Low Tip Speed Tail Rotor Assembly |
| L-160 | 14-10-1996 | 269C | Strut and Bracket Assembly - Belt Drive Installation |
| L-161 | 07-04-1997 | 269 Series | New Improved Clutch Spring Retainer |
| L-162 | 15-04-1997 | 269A, TH-55A, 269A-1, 269B | Compliance of Service Notice N-59, AD 68-21-05, and AD 97-05-06 Against 269A5050-50, -53, and -73 Main Rotor Drive Shaft Thrust Bearing |
| L-163 | 27-09-1999 | 269C, 269C-1 | Exchange Program for Elastomeric Tail Rotor Fork |
| L-164 | 27-09-1999 | 269A, TH-55A, 269C | New Electric Driven Airframe Fuel Pump |
| L-165 | 02-09-1999 | 269A, 269A-1, 269B, 269C, 269C-1 | Compliance with Airworthiness Directive 99-17-10 |
| L-166 | 13-12-1999 | 269C-1, 269C | New Retirement Time Life for 269A5103-51 Input Pinion and 269A5194 Carrier Assembly Installed in Model 269C-1 Helicopters |
| L-167 | 06-06-2000 | 269C-1 | 300CB Engine Time Between Overhaul Extension |
| L-168 | 10-08-2000 | 269A, 269B, 269C, 269C-1 (registered in the United Kingdom) | New SA-269K-101 Fuel System Vent Kits |
| L-169 | 01-09-2000 | 269A, 269B, 269C, 269C-1 | New SA-269K-101 Fuel System Vent Kits |
| L-17 | 21-09-1967 | All 269 Series | Lubrication - Upper Pulley Sprag Clutch; Inspection - Main and Tail Rotor Transmissions |
| L-170 | 01-12-2000 | 269A, TH-55A, 269B, 269C, 269C-1 | Introduction of New 269A5175-35 and -37 Main Rotor Transmission Assemblies |
| L-172.1 | 25-01-2002 | 269A, TH-55A, A-1, B, C, C-1 | New Design - Tail Rotor Drive Shaft |
| L-173 | 22-08-2001 | 269A, TH-55A, A-1, B, C, C-1, D | Special Inspection of Main Rotor Transmission Magnetic Plug |
| L-174 | 11-09-2001 | 269A, TH-55A, A-1, B, C, C-1 | Introduction of New Lower Pulley Bearing Removal Tool |
| L-175 | 11-09-2001 | 269C | Optional Anti-Collision Light Conduit in New 269A2320-17 Tailboom Assemblies |
| L-177 | 13-09-2002 | 269A, TH-55A, A-1, B, C, C-1 | Aft Cluster Fitting Modification Kit (P/N SA-269K-0106-1) |
| L-178 | 13-09-2005 | 269C | Upgrade of 269A4564-5 Linear Actuator |
| L-179 | 13-09-2005 | 269A, A-1, B, 269C | Verification of Mandatory Cluster Fitting Replacement |
| L-180 | 26-09-2008 | 269A, B, C, C-1 | Function of Tail Rotor Driveshaft Damper Block |
| L-181 | 09-01-2009 | 269A, B, C, C-1 | Retirement of Certain Engine and Rotor Tachometer Cables |
| L-182 | 17-06-2009 | 269C, C-1 | ELT Direct Replacement Authorization |
| L-183 | 11-03-2010 | 269 Series | Technical Publications - Policy & Price Changes, 2010 |
| L-185 | 30-08-2011 | 269A, TH-55, A-1, B, C, C-1 | Main Rotor Transmission Oil Seal Collar Usage and Effectivity |
| L-186 | 30-08-2011 | 269A, 269B, 269C, 269C-1 | Specified Fuels Used in 269 Series Helicopters |
| L-187 | 04-01-2012 | 269A, B, C, C-1 | 269 Series Service Bulletins, Service Letters and Temporary Revisions |
| L-188a | 29-11-2022 | 269A, 269A-1, 269B, 269C, 269C-1, 269D | 269A1231 Main Rotor Bearing Set Delivered On or After June 17, 2021 |
| L-19 | 01-04-1967 | All 269 Series | Replacement - Internal Seal, Fuel Drain Valve |
| L-2 | 08-06-1966 | 269A, TH-55A, 269A-1 and 269B | Recommended Overhaul Periods - Rotorcraft Powerplant |
| L-21 | 01-04-1967 | All 269 Series | Chemical Attack - Re: Bolteron and Royalite Parts |
| L-22 | 22-08-1967 | All 269 Series | Interim Revision - HMI Re: Installation Pitch Control Rod, Inspection Pitch Bearing Cases, Main Rotor Swashplate Assembly and Swashplate Scissors Link |
| L-23 | 16-06-1967 | All 500 Model 369H | Approved Fuels for Allison Model 250 Series Engine |
| L-24 | 05-05-1967 | All 269 Series (Lycoming Engines using -200 high tension magnetos) | Proper Height of Contact Springs in -200 Bendix Magneto Distributor Block |
| L-25 | 05-09-1967 | All 269 Series | Parts Replacement - Main Rotor Shaft P/N 5305-3, Hub P/N 5305-5, and Lifting Eye P/N 5305-7 |
| L-26 | 07-07-1967 | All 269 Series | Interim Revision - HMI Re: B1145-1 Main Rotor Blade Assembly |
| L-27 | 10-07-1967 | All Model 500 | Allison Model 250 Engine - Sales and Service |
| L-29 | 22-09-1967 | All 269 Series | Interim Revision (HMI) Re: Lower Coupling Drive Shaft (P/N 269A5504 Basic and 269A5504-5 Shaft Assy) - Wear Tolerances |
| L-3.1 | 05-10-1966 | 269A, TH-55A, 269A-1 and 269B | Interim Revision - Handbook of Maintenance Instructions (HMI) Re: 1200 Hour Periodic Inspection of Main Rotor Gear Drive Assembly |
| L-30 | 25-09-1967 | All 269 Series | New Tail Rotor Blade, P/N 6124-9 |
| L-31 | 02-10-1967 | All 269 Series | Interim Revision - HMI Re: Inspection and Maintenance Procedures for Landing Gear Oleo Dampers |
| L-32 | 31-10-1967 | All 269 Series (HIO-360-A1A, B1A or B1B Fuel Injected Engine) | Bendix Corporation, RS Fuel Injection Service Bulletin No. 23, Dated 10 January 1967 |
| L-33 | 17-11-1967 | All 269 Series | Interim Revision - HMI Re: Overhaul Cycle, Tail Rotor Drive Transmission Assembly |
| L-34 | 13-12-1967 | All 269 Series (equipped with 269A5497-3 lower coupling pulley drive assembly) | Interim Revision (HMI) Re: Special Torque Data - Forward Nut, Lower Pulley Shaft |
| L-35 | 14-12-1967 | All 269 Series | Interim Revision - HMI Re: 25 Hour Periodic Inspection |
| L-36 | 28-12-1967 | All 269 Series | Lycoming Service Instruction No. 1141, Dated 20 October 1967 - Replacement of Worn Starter Ring Gears |
| L-37 | 02-01-1968 | All 269 Series | Interim Revision - HMI Re: Overhaul Cycle, Main Rotor Gear Drive Assembly |
| L-38.1 | 15-07-1968 | All 269 Series | Interim Revision - HMI Re: Inspection - Possible Retirement, Main Rotor Blades |
| L-39 | 27-02-1968 | All 269 Series | Interim Revision (HMI) Re: Inspection - Cable, Belt Drive Clutch Control |
| L-40 | 14-03-1968 | 269A (S/N 0011-0314), 269A-1, 269A-2 and 269B | Interim Revision - HMI Re: 400-Hour Inspection, Droop Stop Retainer Ring |
| L-41 | 14-03-1968 | 269A (TH-55A) S/N 0315 and subsequent | Interim Revision - HMI Re: 600-Hour Inspection, Droop Stop Retainer Ring |
| L-42 | 14-03-1968 | All 269 Series | Interim Revision - HMI Re: Limited Life, Main Rotor Drive Shaft and Main Rotor Gear Box Pinion Assembly |
| L-43 | 05-04-1968 | 269A (TH-55A) S/N 0314 and subsequent | Mixing Main Rotor Transmission Gears |
| L-44 | 18-04-1968 | All 269 Series | Interim Revision - HMI Re: Sudden Stoppage Inspection, Lateral Control Bellcrank, P/N 269A7506 |
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