AD 2005-16-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400 and 747-400D | Airworthiness Directives; Boeing Model 747-400 and 747-400D Series Airplanes |
Unsafe Condition
Reports of corrosion under the cart lift threshold at the station 980 upper deck floor beam, which could result in a cracked or broken floor beam, extensive damage to adjacent structure, and possible rapid decompression of the airplane.
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Required Actions
Inspect for corrosion and cracks of the station 980 upper deck floor beam according to Boeing Alert Service Bulletin 747-53A2503. If corrosion or cracks are found, perform all related investigative and corrective actions before further flight, following the same service bulletin or an approved method.
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Compliance Time
Within 18 months, 36 months, or 120 months, depending on the airplane group and modification status, as specified in the AD.
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Affected Aircraft
Boeing Model 747-400 and 747-400D series airplanes, certificated in any category, as listed in Boeing Alert Service Bulletin 747-53A2503, dated November 11, 2004.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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