AD 2001-15-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Fatigue cracking of the forward and aft inner chords, the frame support, and the splice fitting of the forward inner chord of the upper corner of the station 2598 bulkhead, which could result in reduced structural capability of the bulkhead and the inability of the structure to carry horizontal stabilizer flight loads.
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Required Actions
Perform a high frequency eddy current inspection (HFEC) to detect cracking of the forward and aft inner chords and the splice fitting of the forward inner chord of the station 2598 bulkhead. Perform a detailed visual inspection to detect cracking of the same areas. Repeat inspections at intervals not to exceed 3,000 flight cycles.
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Compliance Time
Within 1,000 flight cycles after June 5, 2000, or prior to the accumulation of 13,000 total flight cycles, whichever occurs later.
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Affected Aircraft
Boeing Model 747 series airplanes, line numbers 1 through 1307 inclusive, 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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