AD 2001-14-22
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-100 and -200 | Airworthiness Directives; Boeing Model 747-100 and -200 Series Airplanes |
Unsafe Condition
Fatigue cracks in the station 800 frame assembly, including the inner chord strap, angles, and exposed web, could extend and fully sever the frame, leading to skin cracks and potential rapid depressurization of the airplane.
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Required Actions
Inspect the station 800 frame assembly using detailed visual, surface high frequency eddy current (HFEC), and open hole HFEC inspections, as applicable. Repair any detected cracking before further flight according to an approved method.
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Compliance Time
Varies based on total flight cycles as of the effective date of the AD, with specific deadlines for inspections within 1,500 flight cycles or 12 months after the effective date, depending on flight cycle count.
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Affected Aircraft
Boeing Model 747-100 and -200 series airplanes, as listed in Boeing Alert Service Bulletin 747-53A2451, including Appendix A, dated October 5, 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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