Airworthiness Directive · Amendment 39-11404 · 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-9-10, -20, -30, -40, and -50 series airplanes, and C-9 (military) airplanes; as listed in McDonnell Douglas Service Bulletin DC9-28-077, dated June 8, 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 general visual inspection to detect certain discrepancies in the wiring of the fuel quantity indicating system (FQIS) in the forward cargo compartment; and corrective actions, if necessary. This amendment is prompted by a report indicating that several discrepancies were found in the wiring of the FQIS due to maintenance or alteration practices. The actions specified by this AD are intended to prevent excessive electrical energy from entering the fuel tanks through the FQIS wiring, which could result in a potential ignition source in the fuel tanks.
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.
