Airworthiness Directive · Amendment 39-13953 · McDonnell Douglas Model MD-11 and MD-11F Airplanes
McDonnell Douglas Model MD-11 and MD-11F Airplanes
This AD applies to McDonnell Douglas Model MD-11 and MD-11F airplanes, certificated in any category; as identified in Boeing Alert Service Bulletin MD11-28A119, dated June 3, 2003.
The FAA is adopting a new airworthiness directive (AD) for certain McDonnell Douglas Model MD-11 and MD-11F airplanes. This AD requires inspecting the power feeder cables of the auxiliary power unit (APU) for chafing damage, and accomplishing any related corrective action. This AD also requires modifying the drain line of the fuel feed shroud of the horizontal stabilizer. This AD is prompted by a report of the drain line of the fuel feed shroud riding on the power feeder cables of the APU. We are issuing this AD to prevent chafing of the power feeder cables of the APU, which could result in electrical arcing to adjacent structure and consequent fire in the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 18 months after the effective date of this AD: Do the actions required by paragraphs (f)(1) and (f)(2) of this AD by doing all the actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin MD11-28A119, including appendix A, dated June 3, 2003.
(1) Accomplish a general visual inspection of the power feeder cables of the APU for chafing damage. Do any related corrective action before further flight.
(2) Modify the drain line of the fuel feed shroud of the horizontal stabilizer (including a functional test after accomplishing the modification).
Note 1: For the purposes of this AD, a general visual inspection is: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”
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.
