AD 2000-25-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Fatigue cracking of the front spar web of the wing, which could result in fuel leaking onto an engine and a consequent fire.
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Required Actions
Inspect the front spar web of the wing to detect cracking. Take corrective action if cracking is found. Operators of airplanes modified by Boeing Service Bulletin 747-57A2303 may apply for an alternative method of compliance if choosing the Part 2 optional web inspection.
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Compliance Time
Within 13,000 flight cycles or 30,000 flight hours after the replacement of the front spar web, if modified by Boeing Service Bulletin 747-57A2303. Otherwise, compliance is required within a specified timeframe not detailed in the provided text.
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Affected Aircraft
Boeing Model 747 series airplanes, as listed in Boeing Alert Service Bulletin 747-57A2311, dated January 27, 2000, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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