Airworthiness Directive · Amendment 39-8890 · The Boeing Company Airplanes
The Boeing Company Airplanes
This AD applies to The Boeing Company DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment supersedes an existing airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-80 series airplanes and Model MD-88 airplanes, that currently requires an inspection to detect damage of the auxiliary power unit (APU) power feeder cable installation, repair of damaged cables, and modification of the cable installation. This amendment requires an inspection of previously modified airplanes to determine whether a spacer or "stand off" has been installed, and installation of those items, if necessary. This amendment is prompted by reports of generator power feeder cables electrically shorting to the airplane structure due to chafing. The actions specified by this AD are intended to prevent the APU power feeder cable from chafing against adjacent structures, which could result in electrical shorting and arcing, and a fire below the cabin floor.
