AD 2004-25-23
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Fatigue cracks in the top and side panel webs and stiffeners of the nose wheel well (NWW), which could compromise the structural integrity of the NWW and could lead to the rapid depressurization of the airplane.
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Required Actions
Perform repetitive inspections for cracking of the top and side panel webs and panel stiffeners of the nose wheel well (NWW). Replace cracked stiffeners with new stiffeners. Repair any cracked panel web. Operators may choose to follow either Revision 1 or Revision 2 of Boeing Alert Service Bulletin 747-53A2465 for inspections and repairs.
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Compliance Time
Within 1,000 flight cycles for external detailed inspections and 6,000 flight cycles for internal detailed and surface high frequency eddy current (HFEC) inspections, as per Revision 2 of the service bulletin.
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Affected Aircraft
All Boeing Model 747 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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