Airworthiness Directive · Amendment 39-8934 · Schweizer Aircraft Corporation Helicopters
Schweizer Aircraft Corporation Helicopters
This AD applies to Schweizer Aircraft Corporation 269A, 269A-1, 269B, 269C.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment supersedes an existing airworthiness directive (AD), applicable to Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, and TH-55A series helicopters, that currently requires repetitive inspections and replacement of certain lower belt drive pulley bearings (pulley bearings). This amendment retains the present AD requirements and adds an alternate pulley bearing to the requirements of the AD. This amendment is prompted by the introduction of an alternate pulley bearing into service by Schweizer Aircraft Corporation. The actions specified by this AD are intended to prevent failure of the pulley bearings, loss of power to the rotor systems, and subsequent loss of control of the helicopter.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
