SERVICE LETTERS

DateNumberStatusNomenclature
June 8, 1966L-1IncorporatedInput Spline Coupling PN 269A5607 Time Increase - Tail Rotor Transmission
June 8, 1966L-2IncorporatedRecommended Overhaul Period - Rotorcraft Powerplants
October 5, 1966L-3.1IncorporatedInterim Revision - Handbook of Maintenance Instruction (HMI) Re: 1200 Hour Periodic Inspection of Main Rotor Gear Drive Assembly
July 21, 1966L-4CancelledRebate Time Allowance - Lower Coupling Drive Shaft Assembly PN 5504-5
August 1, 1966L-5IncorporatedReplacement of Thermostatic Oil Cooler By Pass Valves, Per AVCO, Lycoming Division, Service Bulletin No. 304A (Red Bordered Mandatory) (dated), 24 June 66
November 23, 1966L-6.1IncorporatedBendix Fuel Injection System, RSA Series Trouble Shooting Technique for Identifying Fuel to Air Seal Leak
August 22, 1966L-7IncorporatedBelt Drive Clutch Engagement Spring PN 5476 -Availability and Utilization
October 4, 1966L-8IncorporatedIllumination Intensity - Engine Instrument
October 13, 1966L-9ActiveReplacement - Fuel Flow Tubing Assembly
November 7, 1966L-10IncorporatedPressure Variation with Temperature - Amphibious Float Landing Gear
December 1, 1966L-11IncorporatedIntake Pipe Replacement Per AVCO - Lycoming Division Service Instruction No. 1162 (dated), 16 Sept 1966
December 5, 1966L-12IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Main and Tail Rotor Overspeed Criteria
January 11, 1967L-13IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Limited Life and Component Overhaul List
February 20, 1967L-14IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Inspection Sudden Stoppage Drive System
February 21, 1967L-15.1IncorporatedDefinition - Limited Parts
August 23, 1967L-16ActiveInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Maintenance Instruction for Low Tip Speed Tail Rotor Assembly
March 29, 1967L-17IncorporatedRetrofit - Clutch Spring Attachment Strap
April 1, 1967L-18CancelledOrdering - Main Rotor Blades
April 1, 1967L-19IncorporatedReplacement - Internal Seal, Fuel Drain Valve
April 1, 1967L-20Superseded N-41Lycoming Service Letter No . L157A (dated), 9 Dec 66; Engine Mounted Full-flow Oil Filter
April 1, 1967L-21IncorporatedChemical Attack - Re: Bolteron and Royalite Parts
August 22, 1967L-22IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Installation Pitch Control Rod Inspection of Pitch Bearing Cases, Main Rotor Swashplate Assembly and Swashplate Scissors Link
June 16, 1967L-23IncorporatedApproved Fuels for Allison Model 250 Series Engine
May 5, 1967L-24IncorporatedProper Height of Contact Spring in - 200 Bendix Magneto Distributor Block
September 5, 1967L-25ActiveParts Replacement - Main Rotor Shaft PN 5305-3, Hub 5305-5 and Lifting Eye 5305-7
July 7, 1967L-26IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: PN B1145-1 Main Rotor Blade Assembly
July 10, 1967L-27IncorporatedAllison Model 250 Engine - Sales and Service
July 27, 1967L-28CancelledConversion of HO-360 - Bl A or HO-360-BlB Carburated Engine to HiO-360-BlB Fuel Injection Engine
September 22, 1967L-29IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Lower Coupling Drive Shaft PN 269A5504 (basic) and -5 Shaft Assembly- Wear Tolerance
September 25, 1967L-30IncorporatedNew Tail Rotor Blade PN 6124-9
October 2, 1967L-31IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Lower Coupling Drive Shaft PN 269A5504 (basic) and -5 Shaft Assembly- Wear Tolerance Gear Oleo Dampers
October 31, 1967L-32IncorporatedBendix Corporation; RS Fuel Injection Service Bulletin No. 23 (dated), 10 Jan 1967
November 17, 1967L-33IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Overhaul Cycle, Tail Rotor Drive Transmission Assembly
December 13, 1967L-34IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Special Torque Data - Forward Nut, Lower Pulley Drive Shaft
December 14, 1967L-35IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: 25 Hour Periodic Inspection
December 28, 1967L-36ActiveLycoming Service Instruction No . 1141 (dated), 20 Oct 1967 - Subject: Replacement of Wom Starter Ring Gears
January 2, 1968L-37IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Overhaul Cycle; Main Rotor Gear Drive Assembly
January 31, 1968L-38.1IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Inspection - Possible Retirement, Main Rotor Blades
February 27, 1968L-39IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Inspection - Cable Belt Drive Clutch Control
March 14, 1968L-40IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: 400 Hour Inspection - Droop Stop Retainer Ring
March 14, 1968L-41IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: 600 Hour Inspection - Droop Stop Retainer Ring
March 14, 1968L-42IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Limited Life; Main Rotor Drive Shaft and Main Rotor Gear Box Pinion Assembly
April 5, 1968L-43IncorporatedMixing Main Rotor Transmission Gears
April 18, 1968L-44IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Sudden Stoppage Inspection; Lateral Control Bellcrank PN 269A7506
February 10, 1984L-45.2Superseded L-145Salvage Parts - 269 Series Helicopters
February 18, 1973L-46.2Bendix Energy Controls Division - Field Service Representation
July 16, 1968L-47IncorporatedInterim Revision - Handbook of Maintenance Instructions (HMI) Re: Wear Tolerances - PN 269A5618 Output Shaft (RMI) Re: Wear Tolerances - PN 269A5618 Output Shaft.
Tail Rotor Transmission
September 11, 1968L-48IncorporatedBalance Weight Installation - Main Rotor Blades
March 12, 1969L-49.1ActiveGrommet PN 269A2309, Tail Rotor Control Rod Guide Assembly
February 14, 1978L-50.8Superseded L-113.6Exchange Program - Major Helicopter Components
October 18, 1968L-51IncorporatedMain Rotor Blade Categories A, B, C and D
November 22, 1968L-52IncorporatedParts Replacement Kit PN 269A5540-901 Belt Drive Clutch Damper Assembly
December 9, 1968L-53IncorporatedInspection of Landing Gear Skid Assembly
February 20, 1969L-54ActiveTailboom Spoiler PN 269A2320-5
April 29, 1970L-55IncorporatedTailboom Center Support (Saddle) Fitting PN 269A2324-7
June 12, 1970L-56IncorporatedOil Pressure Limitations
November 4, 1970L-57IncorporatedNew Attaching Hardware - Engine Cooling Shroud Side Panels
April 19, 1971L-58IncorporatedNew Heavy Wall Drive Shaft for High Speed Tail Rotor System
July 6, 1971L-59IncorporatedOrdering Replacement Engine Air Intake Pipes
April 6, 1972L-60.1IncorporatedTiming of Magneto and Engine Ignition System
August 23, 1971L-61IncorporatedIncreased Overhaul Time Interval for Main and Tail Rotor Transmissions
October 8, 1971L-62IncorporatedBendix Electrical Components Division - Service Bulletin No . 551 (dated), September 1971 - New Distributor Block Lubricant
November 1, 1971L-63ActiveLycoming Service Bulletins No. 340 and 341 (dated), 27 August 1971
December 13, 1971L-64IncorporatedLamp Replacement - PN 269A4322 Anticollision Light Assembly (Grimes)
January 21, 1972L-65IncorporatedAbrasion Tape Application - Main Rotor Blades PN 269B1145,
February 14, 1972L-66IncorporatedDesert Oil Cooler Kit
April 6, 1972L-67ActiveImproved Main Rotor Blade Damper Assembly PN 269Al927-5
August 7, 1972L-68.1IncorporatedLycoming Service Bulletins, No. 336B (dated), 19 June 1972 and No . 343A (dated), 18 February 1972 - Periodic Inspection - Lubrication and Parts Replacement for Bendix S4LN-1208 Magnetos
May 1, 1972L-69IncorporatedTail Rotor Gearbox PN 269A6027 - Interchangeability Between Model 269 Series Helicopters
July 24, 1972L-70IncorporatedLycoming Service Bulletin No. 336B (dated), 19 June 1972 Re: Periodic Inspection and Lubrication of Magneto Distributor Bushing; Periodic Parts Replacement of Left Magneto
September 12, 1972L-71ActiveLycoming Service Bulletin No . 355 (dated) , 4 August 1972 - Alternator Fan Replacement (Prestilite Bulletin No. ASM-8)
November 1, 1972L-72IncorporatedLycoming Service Instruction No. 1255 (dated), 4 August 1972 -Thermostatic Oil Cooler Bypass Valve Replacement
January 2, 1973L-73IncorporatedInflated Float Installation - Battery Acid Spillage
January 2, 1973L-74IncorporatedFuel Shutoff Control Cable - Rerouting to Reduce Operating Friction
February 13, 1973L-75IncorporatedIncrease Ring Gear to Carrier Torque
March 1, 1973L-76IncorporatedCorporate Name Change
July 31, 1973L-77IncorporatedAvco Lycoming Service Bulletin No . 365 (dated), 1 June 1973 - Bendix Magneto Conversion to Incorporate Flexible Drive
October 22, 1973L-78IncorporatedNew Main Transmission Input Pinion Forward Roller Bearing PN 269A5051-20
December 24, 1973L-79IncorporatedVendor Warranty and Repair - Police Patrol Equipment
April 1, 1974L-80ActiveHigh Speed Rotor PN 269A6004 - Spare Assembly and Component Availability
May 31, 1974L-81IncorporatedDiscussion of Hughes Serial Numbering Method
August 5, 1974L-82IncorporatedInflatable Floats - Service , Maintenance and Repair Facilities
November 11, 1974L-83Available Upon RequestReplacement - Tail Rotor Control Pedal Retaining Pins
November 18, 1974L-84IncorporatedReplacement - 24V Clutch Actuator Noise Filter Capacitors
May 5, 1975L-85IncorporatedBendix Fuel Injection System Flow Divider Installation on HiO-360 Series Engine - Inspection/Modification
November 5, 1979L-86.2IncorporatedMain Transmission - Ring , Pinion Gear Compatib i lity
August 11, 1975L-87IncorporatedNew Conical Type Teeter Bearings for LTS Tail Rotor Assembly
December 23, 1900L-88IncorporatedProper Correlation of Throttle and Collective Pitch Controls
December 11, 1975L-89IncorporatedNew Fiberglass Canopy Slat Installation PN 269A269A2216
July 26, 1976L-90IncorporatedNew Tail Rotor Blades with Cadmium Plated Spar Assembly for Improved Corrosion Protection
July 26, 1976L-91IncorporatedAlternate Lamp for Engine Instrument 3-Pack Units PN 269A4112 Series
October 11, 1976L-92IncorporatedNew PN 269B1145-25 Main Rotor Blade with Trim Tab
August 8, 1977L-93IncorporatedNew Aluminum Isolator Brackets for Mounting Engine Cooling Scroll Reduce Stress Levels in Engine Hanger Assemblies
July 22, 1977L-94ActiveFiberglass Canopy Slat Installation PN 269A2216 - Attachment of Night Flying Position Lights
December 15, 1977L-95ActiveNew PN 269Al 185-1 and 269Al 190-l Main Rotor Blade Assemblies with Leading Edge Abrasion Strip
April 10, 1978L-96IncorporatedPaint Schedules and Ordering Procedures
May 22, 1978L-97IncorporatedInspection and Serviceability - Main Rotor Thrust Bearing PN 269A5050-63 and -73
November 2, 1981L-98.1IncorporatedApproved Grease for Drive System Rotating Bearings
July 15, 1978L-99IncorporatedInstallation of Engine Exhaust Flange Gaskets
January 7, 1980L-100.1CancelledExchange Program - Major Helicopter Componen t s
August 1, 1979L-101IncorporatedLimited Life Increase for PN 269A5050-63 and -73 Main Rotor Thrust Bearings; Unlimited Service Life for PN 369A5408 Series Tail Rotor Transmission (LTS) Output Shaft
September 28, 1979L-102IncorporatedNew PN 269A8251 Heat Insulation Kit for Model 269C Engine Exhaust System
August 27, 1979L-103IncorporatedMain Transmission Input Pinion Shaft PN 269A5103 and -9 - Limited Life Increased to 6000 Hours
September 28, 1979L-104ActiveInstallation of Engine Exhaust Collector Required for 2050 LB Gross Weight Helicopter Operation
November 19, 1979L-105IncorporatedBelt Drive Transmission PN 269A5559-3 Coupling Shaft - Limited Life Increase to 6000 Hours
February 1, 1982L-106.1IncorporatedDrive System Rotating Bearings - Daily Purge with Mobil 28 Grease
December 10, 1979L-107IncorporatedNew Comfort Clips for Sam Browne Seat Belt and Shoulder Harness Assemblies
January 1, 1980L-108IncorporatedNew Wedge Base Lamp Socket PN 2973932 for Both Instrument Cluster Assemblies
March 24, 1980L-109IncorporatedBushing Requirements for PN 269A2324-7 Tailboom Center Support (Saddle) Fitting Installation
November 19, 1982L-110.lActive12V Battery Relay PN MS24166Dl - Corrosion Protection and Relay Replacement
June 9, 1980L-111Superseded by L-156New Seal Requirement for Overhaul of PN 269A3150 - 5 and -7 Landing Gear Damper Assemblies
June 9, 1980L-112IncorporatedPeriodic Cleaning and Lubrication of Sealed Bearing - Upper Pulley, Lower Coupling Drive Pulley, Idler Pulley and Main Rotor Drive Shaft Thruster Bearing
February 12, 1985L-113.6IncorporatedExchange Program - Selective Helicopter Components
February 15, 1983L-114.2IncorporatedNew Drive Belt H - Frame with PN 269A5050 - 78 Upper Pulley Bearing Having Service Life of 3000 Hours
September 30, 1980L-115ActiveCompliance with FAA Airworthiness Directives and Hughes Mandatory (Red Border) Service Information
December 8, 1980L-116CancelledCustomer Request for Original Weight and Balance Data
July 21, 1981L-117.1IncorporatedPeriodic Inspection and Replacemen t - Main Rotor Hub Attaching Bolts PN 269Al229 and 269Al232
July 1, 1983L-118.5CancelledBiannual Listing of Airworthiness Directives versus the Associated Hughes Service Information Notice
November 2, 1981L-119.lIncorporatedAeroshell 14 Grease Only Approved Lubricant for Rotor System Oscillating Bearings
July 31, 1981L-120IncorporatedGround Handling Precautions for Main Rotor Systems Equ i pped w i th Elas t omericdampers
August 21, 1981L-121IncorporatedCorrosion Control Manual now Available for General Distri b ution and Purchase
September 1, 1981L-122Superseded N - 214Finite Life Increase for PN 269A6065 and 369Al 706 Tail Rotor Retention Straps Installed on Model 269C Helicopters
September 1, 1981L-123IncorporatedNew Protective Boot for 269A6034 Series LTS Tail Rotor Assembly
September 1, 1981L-124IncorporatedTorque Value Established for PN 269A5714 Tail Rotor Drive Shaft Forward Reta i ning Nut
October 1, 1981L-125IncorporatedNew PN 269A5498 - 5 Lower Coupling Pulley Drive Shaft Provides as Replacement for PN 269A5498 - 3 Drive Shafts
September 1, 1982L-126.1Available upon requestSummary of FAA Supplemental Type Certificates for Hughes Model 269 Series Helicopters
April 9, 1982L-127.1ActiveUnlimited Service Life PN 269A5430 and -1 Driving Spl i ne Fitting and 269A6030 Driven Spline and Inspection Criteria
L-128Never Issued
February 15, 1982L-129IncorporatedPN 269A5050 - 74 Idler Pulley Bearing and PN 269A5050- 78 Belt Drive H-Frame Upper Bearing - Service Life Increased to 3000 Hours
March 26, 1982L-130IncorporatedNew 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
February 1, 1984L-131.1ActiveDistribution and Shipment of Schweizer - Hughes Model 300 Publications
November 24, 1982L- 132ActiveNew Tailboom Assembly PN 269A2320 - 9
February 27, 1984L-133ActiveUnauthorized Tailboom Assemblies for 269 Series Helicopters
March 9, 1984L-134CancelledReturn of Parts/Components to Schweizer Aircraft Corp.
February 11, 1986L-135Superseded N-214Service Life Cutoff Limit
March 8, 1986L-136CancelledLoan of Schweizer Throttle Governor Wire Harness Test Box PN 269A4995-301-99801-3
March 30, 1900L-137ActiveReplace Aircraft Identification Plates
February 11, 1986L-138ActiveService Life Cutoff Limit
January 2, 1987L-139IncorporatedCleaning of Elastomeric Dampers
January 2, 1987L-140ActiveProper Operations of Trim Controls
January 2, 1987L-141ActiveExplanation of Temporary Revision System
January 2, 1987L-142IncorporatedLife Limit Update
January 2, 1987L-143IncorporatedOverhaul Schedule Update
September 29, 1987L-144IncorporatedBreakaway Torque Increase - MR Bearing Assembly
March 10, 1988L-145ActiveCompany Policy - Unapproved Parts
September 1, 1987L-146ActiveAvco Lycoming Service Bulletins - No. 454B Replacement of Oil Pump Impellers, No. 456C Replacement of Oil Pump Impellers and No.477A Inspection and Rework of PNLW-18790 Rocker Arm Assembly
December 15, 1987L-147ActivePublication Index - Major Change in Scope and Revision Process
February 1, 1989L-148ActiveLubricating Oil
August 24, 1990L-149ActiveChanges to Notice and Letter Nomenclature
July 24, 1996L-150.2ActiveNew Belt Drive Transmission H-Frame
May 30, 1991L-151ActivePrinter Errors in Notice and Letter Sets January 1990
November 7, 1991L-152ActiveNew Part Numbers for Tail Rotor Transmission Assembly
November 7, 1991L-153ActiveExtended Warranty Policy for Pinion and Ring Gears Installed in Main Rotor Transmissions Affected by Service Bulletin in Main Rotor Transmissions Affected by Service Bulletin
B-244
May 8, 1992L-154ActiveRepair Facilities for Corrosion Damage Inspection of Main Rotor Driveshaft P/N 269A5305. Ref. Service Bulleting B-243
April 29, 1993L-155ActiveMain Rotor Rod End Bearings and Lead-Lag Bushings
April 29, 1993L-156IncorporatedNew Improved Landing Gear Dampers
April 29, 1993L-157ActiveOverhaul Kits for Fuel Shut-Off and Drain Valves
April 29, 1993L-158ActiveImproper Maintenance Procedures in Installation of the 269A2324 Series Tail Boom Support Fitting (Saddle Fitting) Which Results in a Hazardous Flight Condition
April 30, 1995L-159IncorporatedAdditional Lubricants for Lower Coupling Drive Shaft
April 13, 1900L-160ActiveStrut and Bracket Assembly - Belt Drive Installation
April 7, 1997L-161ActiveNew Improved Clutch Spring Retainer
April 15, 1997L-162ActiveCompliance of Service Notice N-59, AD 68-21-05, and AD 97-05-06against 269A5050-50, -53, and -73 Main Rotor Drive Shaft Thrust Bearing (Applicable to Models 269A, TH-55A, Shaft Thrust Bearing (Applicable to Models 269A, TH-55A,
269A-l & 269B)
September 27, 1999L-163ActiveExchange Program for Elastomeric Tail Rotor Fork
September 27, 1999L-164ActiveNew Electric Driven Airframe Fuel Pump
September 2, 1999L-165ActiveCompliance with Airworthiness Directive 99-17 - 10
December 13, 1999L-166ActiveNew Retirement Life for 269A51053-51 Input Pinion and 269A5194 Carrier Assembly Installed in Model 269C-l Helicopters
June 6, 2000L-167Active300CB Engine Time Between Overhaul Extension
August 10, 2000L-168Active (UK Only)New SA-269K-101 Fuel System Vent Kits
September 1, 2000L-169ActiveNew SA - 269K-101 Fuel System Vent Kits
December 1, 2000L-170ActiveIntroduction of New 269A5175-35 and - 37 Main Rotor Transmission Assemblies
December 1, 2000L-171ActiveOrientation of Main Rotor Transmission Backlash Shim
January 25, 2002L-172.1ActiveNew Design - Tail Rotor Drive Shaft
August 22, 2001L-173ActiveSpecial Inspection of Main Rotor Transmission Magnetic Plug
September 11, 2001L-174ActiveIntroduction of New Lower Pulley Bearing Removal Tool
September 11, 2001L-175ActiveOptional Anti-Collision Light Conduit in New 269A2320 - 17 Tailboom Assemblies
L-176Not Issued
September 13, 2002L-177ActiveAFT Cluster Fitting Modification Kit (PIN SA-269K-0106 - l)
September 13, 2005L-178ActiveUpgrade of 269A4564-5 Linear Actuator (PIN SA - 269K-116)
September 13, 2005L-179ActiveVerification of Mandatory Cluster Fitting Replacement
September 26, 2008L-180ActiveFunction of Tail Rotor Driveshaft Damper Block
January 9, 2009L-181ActiveRetirement of Certain Engine and Rotor Tachometer Cables
June 17, 2009L-182ActiveELT Direct Replacement Authorization
March 11, 2010L-183ActiveTechnical Publications - Policy & Price Changes, 2010
March 11, 2010L-184Active2010 Publications Schedule
August, 30, 2011L-185Active
SUBJECT: MAIN ROTOR TRANSMISSION OIL SEAL COLLAR USAGE AND EFFECTIVITY
August, 30, 2011L-186ActiveSpecified Fuels Used in 269 Series Helicopters
January 4, 2012L-187ActiveTo align with Sikorsky Aircraft Corporation’s Standard of Work for technical information, the following changes have been made to notifications.
September 23, 1998DL-001ActiveMODIFICATION OF AIRCRAFT PARTS CORPORATION STARTER/GENERATOR
July 6, 1999DL-002ActiveNEW SPLINED MAIN ROTOR HUB AND DRIVE SHAFT DESIGN WITH INCREASED TIME LIFE
July 6, 1999DL-003ActiveNEW DESIGN MAIN ROTOR DRIVE SHAFT THRUST BEARING
September 2, 1999DL-004ActiveCOMPLIANCE WITH AIRWORTHINESS DIRECTIVE 99-17-10
May 2, 2000DL-005ActiveINTERFACE AND PROGRAMMING OF THE GPS150/150XL TO DISPLAY SHADIN FUEL FLOW DATA ON THE GPS
August 11, 2000DL-006ActiveMODIFICATION KIT FOR 269D/330 START/GENERATOR ELECTRICAL SYSTEM
November 10, 2000DL-007ActiveORIENTATION OF MAIN ROTOR TRANSMISSION BACKLASH SHIM
December 1, 2000DL-008ActiveINTRODUCTION OF NEW 269A5175-39 MAIN ROTOR TRANSMISSION ASSEMBLY
January 25, 2002DL-009ActiveNEW DESIGN - TAIL ROTOR DRIVE SHAFT
March 1, 2006DL-010ActiveEXCHANGE PROGRAM FOR CEF INDUSTRIES 8618M33 N2 TRIM ACTUATOR
July 21, 2006DL-011ActiveINTRODUCTION OF NEW MAIN ROTOR TRANSMISSION ASSEMBLY AND BELT DRIVE TRANSMISSION ASSEMBLY CONTAINING AN EXTENDED HUB UPPER PULLEY ASSEMBLY
December 8, 2008DL-012ActiveSTRUCTURAL ENHANCEMENT OF TAIL ROTOR PEDAL MOUNT
June 11, 2009DL-013ActiveENGINE/TRANSMISSION OIL COOLER IMPELLERS
November 13, 2009DL-014ActiveC20W FUEL PUMP BYPASS CHECK
March 2010DL-015ActiveTechnical Publications - Policy & Price Changes, 2010
March 11, 2010DL-016Active2010 PUBLICATIONS SCHEDULE
July 16, 2010DL-017ActiveLIMITED TIME UPGRADE OFFER
DL-018Not Used
September 21, 2011DL-019ActiveMain Transmission Ring Gear Carrier Assembly – Request for Information
January 2, 2012DL-020Active269 Series Service Bulletins, Service Letters and Temporary Revisions
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