AD 2013-07-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Scribe lines can occur where external decals are installed or removed across lap joints, large cargo door hinges, or external doublers. These scribe lines can develop into fatigue cracks in the skin, which can grow and cause sudden decompression of the airplane.
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Required Actions
Inspect for scribe lines in the skin along lap joints, butt joints, certain external doublers, and the large cargo door hinges. Add an inspection for scribe lines where external decals have been applied or removed across lap joints, large cargo door hinges, and external doublers. Perform related investigative and corrective actions if necessary.
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Compliance Time
Within 24 months after the effective date of this AD, or at the applicable time specified in Boeing Service Bulletin 777-53A0054, Revision 1, dated November 4, 2010, for the scribe line inspection, whichever is later.
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Affected Aircraft
The Boeing Company Model 777-200, -200LR, -300, and -300ER series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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