Archives: Service Letter

All Service Letter

Timing of Magneto and Engine Ignition System

Main Rotor Blade Categories A, B, C and D

Bendix Corporation; RS Fuel Injection Service Bulletin No. 23 (dated), 10 Jan 1967

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: Overhaul Cycle, Tail Rotor Drive Transmission Assembly

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: Special Torque Data – Forward Nut, Lower Pulley Drive Shaft

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: 25 Hour Periodic Inspection

Lycoming Service Instruction No . 1141 (dated), 20 Oct 1967 – Subject: Replacement of Wom Starter Ring Gears

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: Overhaul Cycle; Main Rotor Gear Drive Assembly

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: Inspection – Cable Belt Drive Clutch Control

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: 400 Hour Inspection – Droop Stop Retainer Ring