Airworthiness Directive · Amendment 39-9771 · The Boeing Company Airplanes
The Boeing Company Airplanes
This AD applies to The Boeing Company 767-200 Series, 767-300 Series, 767-300F Series.
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 adopts a new airworthiness directive (AD), applicable to all Boeing Model 767 series airplanes, that requires repetitive operational tests to verify proper deployment of the ram air turbine (RAT), and replacement of the rotary actuator motor with a new or serviceable rotary actuator motor, if necessary. This amendment is prompted by reports of corroded rotary actuator motors of the RAT found on in-service airplanes. The actions specified by this AD are intended to ensure that the RAT actuator motor is not corroded to the point where it may result in the failure of the RAT to deploy and subsequently result in loss of emergency hydraulic power to the flight controls in the event that power is lost in both engines.
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
