AD Amdt-39-16070
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-100 | Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP Series Airplanes |
Unsafe Condition
Potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.
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Required Actions
Revise the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems. Conduct initial inspections of certain repetitive AWL inspections to phase in those inspections, and repair if necessary. Clarify the intended effect of the AD on spare and on-airplane fuel tank system components regarding maintenance manuals and instructions for continued airworthiness.
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Compliance Time
Within 12 months of the effective date (November 16, 2009)
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Affected Aircraft
Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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