AD 2012-14-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Fatigue cracks in the lap joints, which initiated at scribe lines made during production when maskant was removed from the affected skin panels during the chemical milling process.
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Required Actions
Conduct repetitive external phased-array ultrasonic inspections to detect cracks of the affected fuselage skin lap splices in Sections 41, 43, and 44, as applicable. Repair any detected cracks before further flight, in accordance with Boeing Alert Service Bulletin 777-53A0043. Repeat inspections of unrepaired areas at intervals not exceeding 4,200 flight cycles.
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Compliance Time
Within the compliance times specified in Boeing Alert Service Bulletin 777-53A0043, unless already done.
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Affected Aircraft
The Boeing Company Model 777-200 and -300 series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 777-53A0043, dated November 9, 2011.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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