AD Amdt-39-11436
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed | L-1011-385 | Airworthiness Directives; Lockheed Model L-1011-385 Series Airplanes |
Unsafe Condition
Internal electrical failures in the fuel boost pump of the wing fuel tanks that could result in either electrical arcing or localized overheating, which could breech the protective housing of the fuel boost pump and expose it to fuel vapors and fumes, and consequent potential fire or explosion in the wing fuel tank.
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Required Actions
Revise the Airplane Flight Manual (AFM) to prohibit operation of the fuel boost pumps when fuel quantities are below certain levels. Install a placard on the engineer's fuel panel to advise the maintenance crew that operation of the fuel boost pumps is prohibited under certain conditions. Install a modified fuel boost pump assembly.
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Compliance Time
Within 50 flight hours or 10 days after April 28, 1998, whichever occurs first.
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Affected Aircraft
Lockheed Model L-1011-385-1, -385-1-14, -385-1-15, and -385-3 series 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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