Airworthiness Directive · Amendment 39-12979 · McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 Series Airplanes; and C-9 (Military) Airplanes
McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 Series Airplanes; and C-9 (Military) Airplanes
Model DC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9- 15, and DC-9-15F airplanes; DC-9-21 airplanes; DC-9-31, DC-9-32, DC- 9-32 (VC-9C), DC-9-32F, DC-9-33F, DC-9-34, DC-9-34F, and DC-9-32F (C-9A, C-9B) airplanes; DC-9-41 airplanes; and DC-9-51 airplanes; as listed in McDonnell Douglas Alert Service Bulletin DC9-24A171, Revision 01, dated September 21, 1999; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 series airplanes, and C-9 (military) airplanes, that requires a one-time visual inspection of circuit breakers to determine the manufacturer of the circuit breakers, and corrective action, if necessary. The actions specified by this AD are intended to prevent internal overheating and arcing of circuit breakers and airplane wiring due to long-term use and breakdown of internal components of the circuit breakers, which could result in smoke and fire in the flight compartment and main 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.
