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Thu, May 31, 2007

AD: McDonnell Douglas

AD NUMBER: 2007-11-16
MANUFACTURER: McDonnell Douglas
SUBJECT: Airworthiness Directive 2007-11-16
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all McDonnell Douglas Model MD-11 and MD-11F airplanes.

This AD requires installing bracket assemblies and jumper wires in the center main wheel well to improve the bonding path between the structure (wall) of the lower auxiliary fuel tank and its internal fuel pumps; measuring the electrical resistance between the fuel pump housings and the fuel tank structure; and doing corrective actions if necessary. This AD results from fuel system reviews conducted by the manufacturer.

We are issuing this AD detect and correct an inadequate bond between the internal fuel pump housings and the structure of the lower auxiliary fuel tank.

This condition, not corrected, could fail to meet fault current requirements and result in a potential ignition source that, in combination with flammable fuel vapors, could cause a fuel tank explosion and consequent loss of the airplane.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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