Airworthiness Directive · Amendment 39-13520 · McDonnell Douglas Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; Model DC-9-20, -30, -40, and -50 Series Airplanes; and Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88, and MD-90-30 Airplanes
McDonnell Douglas Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; Model DC-9-20, -30, -40, and -50 Series Airplanes; and Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88, and MD-90-30 Airplanes
This AD applies to the airplanes listed in Table 1 of this AD, certificated in any category: Table 1.--Applicability McDonnell Douglas model As listed in DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31, DC- Boeing Alert Service 9-32, DC-9-32 (VC-9C), DC-9-32F, DC-9-33F, DC-9- Bulletin DC9-25A350, 34, DC-9-34F, DC-9-32F (C-9A, C-9B), DC-9-41, Revision 01, dated DC-9-51, DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9- June 14, 2002. 83 (MD-83), DC-9-87 (MD-87), and MD-88 airplanes. MD-90-30 airplanes.............................. Boeing Alert Service Bulletin MD90-25A009, Revision 01, dated July 1, 2002.
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas airplane models, that requires inspection of the captain's and first officer's seat locking pins for minimum engagement with the detent holes in the seat tracks; inspection of the seat lockpins for excessive wear; and corrective actions, if necessary. This action is necessary to prevent uncommanded seat movement during takeoff and/or landing, which could result in interference with the operation of the airplane and consequent temporary loss of control of the airplane. 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.
