Archives: Service Letter

All Service Letter

New Design – Tail Rotor Drive Shaft

New SA-269K-101 Fuel System Vent Kits

New Electric Driven Airframe Fuel Pump

AFT Cluster Fitting Modification Kit (PIN SA-269K-0106 – l)

Company Policy – Unapproved Parts

New Belt Drive Transmission H-Frame

Avco Lycoming Service Bulletins – No. 454B Replacement of Oil Pump Impellers, No. 456C Replacement of Oil Pump Impellers and No.477A Inspection and Rework of PNLW-18790 Rocker Arm Assembly

Lubricating Oil

Changes to Notice and Letter Nomenclature

Printer Errors in Notice and Letter Sets January 1990