Airworthiness Directive · Amendment 39-12747 · McDonnell Douglas Model MD-90-30 Airplanes
McDonnell Douglas Model MD-90-30 Airplanes
Model MD-90-30 airplanes, as listed in McDonnell Douglas Alert Service Bulletin MD90-24A004, Revision 01, dated January 11, 2000; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-90-30 airplanes, that requires modification of the main battery ground stud and installation of a nameplate which indicates torque requirements for the ground stud nut. The actions specified by this AD are intended to prevent the ground stud nut from being inadequately tightened or becoming loose, which could result in electrical arcing between the ground stud and the adjacent structure, leading to damage to electrical or electronic equipment or possibly to fire in the airplane.