AD 2007-11-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McDonnell Douglas | MD-11 and MD-11F | Airworthiness Directives; McDonnell Douglas Model MD-11 and MD-11F Airplanes |
Unsafe Condition
An inadequate bond between the internal fuel pump housings and the structure of the lower auxiliary fuel tank could fail to meet fault current requirements, resulting in a potential ignition source that, in combination with flammable fuel vapors, could cause a fuel tank explosion and consequent loss of the airplane.
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Required Actions
Install bracket assemblies and jumper wires between the structure of the lower auxiliary fuel tank and its internal fuel pumps. Measure the electrical resistance between the fuel pump housings and the lower auxiliary fuel tank wall. If any resistance measurement is greater than 2.5 milliohms on either fuel pump housing, rework the electrical bonding to achieve a resistance measurement of 2.5 milliohms or less on both fuel pump housings before further flight.
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Compliance Time
Within 60 months after the effective date of this AD
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Affected Aircraft
All McDonnell Douglas Model MD-11 and MD-11F airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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