Service Letters

Interim Revision of HMI Appendix C Component Overhaul Manual – Tail Rotor Drive Fork and Hub Assembly Equipped With Conial Type Teeter Bearings


Introduction of the Use of an Alternate Drive System Lubricant


KAMATICS SHAFT AND COUPLING OVERHAUL AND EXCHANGE PROGRAM ANNOUNCEMENT


KRA 405B RADIO ALTIMETER


Lubrication of Drive End Bearing Liner in Aircraft Parts Corp. Model 150SG Starter-Generator


Main Rotor Blade Inspection Program


Main Rotor Hub Balancing


Main Transmission PN 369A5100-709 Upgraded Transmission – Factory Availability for Overhaul


MAINTENANCE AND OPERATION REQUIREMENTS FOR SAFE OPERATION OF SURPLUS 369A (OH–6A) SERIES HELICOPTERS


Major Installations and Alterations to Your Hughes Helicopter


Metal Tail Rotor Blades – Replacement for Fiberglass Tail Rotor Blade


Modification Kit Availably – Torquemeter Bleed Valve PN M50043 and Static Pressure Tube Bleed Valve


New Attitude Gyro and Support Assembly


New Cargo Hook Plate


New Conical Type Teeter Bearings for Tail Rotor Assembly


New Main Rotor Damper Assembly PN 369A1423-501


New MDHC Authorized Helicopter Airframe Repair Facilities


New Oil Level Requirement for Initial Installation of Overrunning Clutch PN 369A5350 Series


New PN 369A1100-503 – Main Rotor Blade Assembly With Leading Edge Abrasion Strip


New PN 369D28237 Cushion for Tailpipe Hanger Assembly Designed for Longer Wear