Archives: Service Letter

All Service Letter

Main Rotor Rod End Bearings and Lead-Lag Bushings

New Improved Landing Gear Dampers

Overhaul Schedule Update

Explanation of Temporary Revision System

Lubricating Oil

Breakaway Torque Increase – MR Bearing Assembly

Life Limit Update

Changes to Notice and Letter Nomenclature

Repair Facilities for Corrosion Damage Inspection of Main Rotor Driveshaft P/N 269A5305. Ref. Service Bulleting B-243

Overhaul Kits for Fuel Shut-Off and Drain Valves