AD 2005-13-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400F | Airworthiness Directives; Boeing Model 747-400F Series Airplanes |
Unsafe Condition
Fatigue cracking found on the upper deck floor beam to frame attachment points, leading to potential failure of the upper deck floor beams, which could result in damage to critical flight control cables and wire bundles, loss of controllability, and rapid decompression of the airplane.
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Required Actions
Initial detailed and open-hole high frequency eddy current inspections for cracking of the web, upper chord, and upper chord strap of the upper deck floor beams, repair of any cracking, and a preventive modification of the upper deck floor beams. Repetitive inspections for cracking are required after the modification.
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Compliance Time
Within 1,000 flight cycles after the effective date of this AD or before the accumulation of 15,000 total flight cycles, whichever is later.
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Affected Aircraft
Boeing Model 747-400F series airplanes, certificated in any category, as listed in Boeing Alert Service Bulletin 747-53A2443, dated May 9, 2002.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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