Airworthiness Directive · Amendment 39-13502 · McDonnell Douglas Model DC-9-31 and DC-9-32 Airplanes
McDonnell Douglas Model DC-9-31 and DC-9-32 Airplanes
Model DC-9-31 airplanes having manufacturer's fuselage numbers 1039 and 1046, and Model DC-9-32 airplanes having manufacturer's fuselage numbers 0268 and 0505; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-31 and DC-9-32 airplanes, that requires replacement of certain power relays, and subsequent repetitive cleaning, inspecting, repairing, and testing of certain replaced power relays. This action is necessary to prevent internal arcing of the left and right generator power relays, auxiliary power relays, and external power relays, and consequent smoke and/or fire in the cockpit and cabin. This action is intended to address the identified unsafe condition.
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.
