Airworthiness Directive · Amendment 39-9986 · McDonnell Douglas Model MD-11 and DC-10 Series Airplanes, and KC-10A (Military) Airplanes
McDonnell Douglas Model MD-11 and DC-10 Series Airplanes, and KC-10A (Military) Airplanes
Model MD-11 series airplanes as listed in McDonnell Douglas MD-11 Alert Service Bulletin A26-16, dated November 22, 1993; and Model DC-10 series airplanes and KC-10A (military) airplanes as listed in McDonnell Douglas DC-10/KC-10A Alert Service Bulletin A26-46, dated December 6, 1993; certificated in any category.
This amendment supersedes an existing airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model MD-11 and DC-10 series airplanes, and KC-10A (military) airplanes. That AD currently requires functional testing to verify proper installation of the electrical connectors to the engine generator and fire bell shutoff switches, and correction of the installation, if necessary. This amendment requires installation of a modification that terminates the requirement to perform repetitive functional tests. This amendment is prompted by the development of a modification that minimizes the possibility of improperly connecting (crossing) the electrical connectors to the fire extinguishing handles. The actions specified by this amendment are intended to prevent the wrong engine-driven generator from being shut down unnecessarily in the event of an engine fire warning.
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.
