Archives: Service Letter

All Service Letter

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: Main and Tail Rotor Overspeed Criteria

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: Limited Life and Component Overhaul List

Interim Revision – Handbook of Maintenance Instruction (HMI) Re: 1200 Hour Periodic Inspection of Main Rotor Gear Drive Assembly

Lycoming Service Letter No . L157A (dated), 9 Dec 66; Engine Mounted Full-flow Oil Filter

Replacement – Internal Seal, Fuel Drain Valve

Ordering – Main Rotor Blades

Retrofit – Clutch Spring Attachment Strap

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: Maintenance Instruction for Low Tip Speed Tail Rotor Assembly

Definition – Limited Parts

Interim Revision – Handbook of Maintenance Instructions (HMI) Re: Inspection Sudden Stoppage Drive System