AD 2005-07-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-200F and -200C | Airworthiness Directives; Boeing Model 747-200F and -200C Series Airplanes |
Unsafe Condition
Fatigue cracks in the upper chord and web of upper deck floor beams could result in failure of such floor beams, leading to damage to critical flight control cables and wire bundles, and consequent loss of controllability. Failure of the floor beam could also result in the failure of adjacent fuselage frames and skin, and consequent rapid decompression of the airplane.
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Required Actions
New one-time inspections for cracking of the web, upper chord, and strap of the upper deck floor beams are required. Modification or repair of the upper deck floor beams, as applicable, is also required. Post-modification/repair inspections may be necessary depending on the chosen compliance option.
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Compliance Time
Before further flight
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Affected Aircraft
All Boeing Model 747-200F and -200C series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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