AD 2012-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Loss of the engine fuel suction feed capability of the fuel system, which, in the event of total loss of the fuel boost pumps, could result in dual engine flameout, inability to restart the engines, and consequent forced landing of the airplane.
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Required Actions
Perform an operational test of the engine fuel suction feed of the fuel system, and all applicable corrective actions, in accordance with Boeing Alert Service Bulletin 747-28A2331. Repeat the operational test at intervals not to exceed 30,000 flight hours.
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Compliance Time
Within 30,000 flight hours after the effective date of this AD.
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Affected Aircraft
All The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP 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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