AD 2010-13-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company Model 777-200LR and -300ER | Airworthiness Directives; The Boeing Company Model 777-200LR and -300ER Series Airplanes |
Unsafe Condition
Reports of cracks emanating from the keyway of the fuel tank access door cutout of the lower wing skin between wing rib numbers 8 and 9. This could lead to loss of the lower wing skin load path, causing catastrophic structural failure of the wing.
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Required Actions
Perform a high frequency eddy current (HFEC) inspection for cracking of the keyway of the fuel tank access door cutout on the left and right wings between wing rib numbers 8 (wing station 387) and 9 (wing station 414.5). Take all applicable corrective actions, including related investigative actions, as specified in Boeing Alert Service Bulletin 777-57A0069. Repair any cracks found using an approved method.
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Compliance Time
Varies by group and configuration: Group 1, Configuration 1 airplanes must comply before 3,500 total flight cycles or within 500 flight cycles after the effective date, whichever is later. Group 1, Configuration 2 airplanes and Group 2 airplanes must comply within 1,125 days after the effective date. No further action is required for Group 1, Configuration 2 and Group 2 airplanes where no crack was found in the cutout keyway when the cutout keyway was changed.
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Affected Aircraft
The Boeing Company Model 777-200LR and -300ER series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 777-57A0069, dated November 5, 2009.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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