Service Bulletins

Main Rotor Hub Strap Pack Lamination Inspection and Tri-Flow Wash Procedure


Main Rotor Swashplate Bearing Inspection and Possible Replacement


MODIFICATION – MECHANICAL RELEASE SYSTEM -CARGO HOOK KIT INSTALLATION PN369H90065


MODIFICATION AND ALIGNMENT CHECK –ROTOR BRAKE INSTALLATION


MODIFICATION FOR DOORS – OFF FLIGHT –CANOPY UPPER WINDSHIELD ASSEMBLIES PN369A2405-3 AND 369A2405-4


Modification for Seating and Belts for (4) Kit Installation PN 369H90035-501 (FAA AD 75-09-17)


MODIFICATION KIT (M50438) – TRIM POTENTIOMETER-ENGINE OIL PRESSURE GAGE


NEW PRESSURE–ACTUATED SWITCH – AUTOMATIC ENGINE REIGNITION KIT INSTALLATION PN 369H90118-501 OR PN369H90140


New Shimming Procedure for Tail Rotor Drive Shaft Forward Flexible Coupling PN 369A5501 or 369H92564, With Fail Safe Device Installed


Non – Airworthy Parts


Oil Cooler Belt, One Time Inspection


One-Time Addition of Rivets to Tail Rotor Abrasion Strip


One-time Inspection and Rework of Engine Air Inlet Area


One-Time Inspection and Rework of Main and Tail Rotor Control Tubes (PN’s 369A7007, 369A7009, 369A7011, and 369A7012)


One-Time Inspection of 369A5358 Lockwasher in the Overrunning Clutch Assembly and Inspection of Engine Output Drive Splines


One-Time Inspection of 369H8407 Engine Bleed Air Tube Flexible Area


One-Time Inspection of Aeroquip Hoses (PN’s 369A8352, 369H8306, 369H8025, 369H8024-5 and 369D28651)


ONE-TIME INSPECTION OF FUEL PUMP HARNESS ROUTING AND DECAL INSTALLATION


One-Time Inspection of Tail Rotor Blade Leading Edge Abrasion Strip Bonding Pilot’s Preflight Check of Tail Rotor Blade Leading Edge Abrasion Strip


One-Time Inspection of the Transmission Driveshaft Couplings – 369H5660