AD 2000-25-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400 | Airworthiness Directives; Boeing Model 747-400 Series Airplanes |
Unsafe Condition
Fatigue cracking of the longeron splice fittings at stringer 11 on the left and right sides at body station 2598, which could result in the inability of the structure to carry horizontal stabilizer flight loads and consequent reduced controllability of the horizontal stabilizer.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a detailed visual inspection to detect cracking of the longeron fittings at stringer 11 on the left and right sides at body station 2598, in accordance with Boeing Alert Service Bulletin 747-53A2419, Revision 1. Inspect prior to the accumulation of 17,000 total flight cycles or 63,000 total flight hours, whichever occurs first, or within 24 months after the effective date of this AD.
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Compliance Time
Within 24 months after the effective date of this AD or prior to the accumulation of 17,000 total flight cycles or 63,000 total flight hours, whichever occurs first.
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Affected Aircraft
Boeing Model 747-400 series airplanes, as listed in Boeing Alert Service Bulletin 747-53A2419, Revision 1, dated September 21, 2000; certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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