Airworthiness Directive · Amendment 39-11704 · McDonnell Douglas Model DC-9 Series Airplanes, and Model MD-88 and MD-90-30 Airplanes
McDonnell Douglas Model DC-9 Series Airplanes, and Model MD-88 and MD-90-30 Airplanes
Model DC-9 series airplanes, and Model MD-88 airplanes, as listed in McDonnell Douglas Alert Service Bulletin DC9-25A357, Revision 02, dated May 28, 1998; and Model MD-90-30 airplanes, as listed in McDonnell Douglas Alert Service Bulletin MD90-25A019, dated February 11, 1997; certificated in any category.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9 series airplanes, and Model MD-88 and MD-90-30 airplanes, that requires replacement of the lanyard assembly pins of the evacuation slides with solid corrosion-resistant pins. This amendment is prompted by a report that, due to stress corrosion on the lanyard pins, the arms of the lanyard assembly of the evacuation slide were found to be frozen. The actions specified by this AD are intended to prevent the improper deployment of the evacuation slide due to stress corrosion, which could delay or impede evacuation of passengers during an emergency.
To prevent the improper deployment of the evacuation slide, which could delay or impede evacuation of passengers during an emergency, accomplish the following:
(a) Within 180 days after the effective date of this AD, replace the lanyard assembly pins of the evacuation slides with solid corrosion-resistant pins, in accordance with McDonnell Douglas Alert Service Bulletin MD80-25A357, dated February 11, 1997, Revision 01, dated March 16, 1998, or Revision 02, dated May 28, 1998 (for Model DC-9 series airplanes and Model MD-88 airplanes); or McDonnell Douglas Alert Service Bulletin MD90-25A019, dated February 11, 1997 (for Model MD-90-30 airplanes); as applicable.
(b) As of the effective date of this AD, no lanyard assembly, part number (P/N) 3961899-1 or P/N 3956939-501, shall be installed on any airplane unless that assembly has been modified in accordance with the requirements of paragraph (a) of this AD.
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.
