AD 2007-25-17
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 |
Unsafe Condition
Cracking of the station (STA) 1241 bulkhead fittings just above the canted pressure deck, which could result in reduced structural integrity of the airplane.
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Required Actions
Perform repetitive inspections for cracking of the STA 1241 bulkhead fittings using high-frequency eddy current and external ultrasonic methods. Determine the edge margin at seven fastener positions on each side of the airplane. Perform all applicable related investigative/corrective actions as specified in Boeing Alert Service Bulletin 747-53A2658, except where contact with Boeing is required for appropriate action.
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Compliance Time
Within the compliance times specified in Boeing Alert Service Bulletin 747-53A2658, dated February 22, 2007.
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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, certificated in any category, as identified in Boeing Alert Service Bulletin 747-53A2658, dated February 22, 2007.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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