Archives: Service bulletins

All Service bulletins

Part Number Conversion of 369 Series Part Numbers to 269 Series Part Numbers that are Used on 269 Series Helicopters

Inspection and Modification of Longitudinal Trim Mounting Plate and Trim Arm Stop

Maintenance and Operation Requirements for Safe Operation of Surplus TH-55A Helicopters

Corrosion Damage Inspection of Main Rotor Driveshaft P/N 269A5305

One Time Inspection of Throttle Override Bellcrank Assembly

Main Rotor Driveshaft Inspection

Inspection of Clutch Control Spring Assembly Installation

Tail Rotor Pedal Bulkhead (Floor Beam) Gusset

Corrosion Inspection and Treatment of Lower Coupling Drive Shaft

Tailboom Support Struts Corrosion Inspection