Airworthiness Directive · Amendment 39-14850 · McDonnell Douglas Model MD-11F Airplanes
McDonnell Douglas Model MD-11F Airplanes
This AD applies to certain McDonnell Douglas Model MD-11F airplanes, identified in Boeing Alert Service Bulletin MD11-24A222, dated August 16, 2006; certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain McDonnell Douglas Model MD-11F airplanes. This AD requires a general visual inspection for installation of conduit and chafing damage on the auxiliary power unit (APU) power feeder wires and the upper surface of the auxiliary fuel tank and repair if necessary. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to detect and correct unprotected APU power feeder wires that come into close proximity to the upper surface of the auxiliary "piggy back" fuel tank, which could result in a potential ignition source, and in combination with flammable fuel vapors, could cause a fuel tank explosion and consequent loss of 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 24 months after the effective date of this AD, perform a general visual inspection for installation of conduit and chafing damage on APU power feeder wires and upper surface of the auxiliary fuel tank, in accordance with Boeing Alert Service Bulletin MD11-24A222, dated August 16, 2006. Before further flight, accomplish any applicable repair or replacement in accordance with the alert service bulletin.
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.
