AD 2001-18-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 777-200 | Airworthiness Directives; Boeing Model 777-200 Series Airplanes |
Unsafe Condition
Cracking of the web of the horizontal and sloping pressure decks of the fuselage and certain stiffener splice angles and stiffener end fittings, which could result in rapid in-flight decompression of the airplane.
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Required Actions
Inspect the horizontal and sloping pressure deck webs and specified stiffener components using HFEC, LFEC, or detailed visual methods at specified flight cycle intervals. Repair any cracking found before further flight according to Boeing's service bulletin or an approved method. Optionally, perform a preventative modification to end repetitive inspections.
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Compliance Time
Within specified flight cycle intervals (e.g., 16,000, 31,000, and 46,000 total flight cycles for initial inspections; every 2,500 or 1,000 flight cycles for repetitive inspections).
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Affected Aircraft
Boeing Model 777-200 series airplanes, line numbers 001 through 093 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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