AD 2010-24-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company Model 737-900ER | Airworthiness Directives; The Boeing Company Model 737-900ER Series Airplanes |
Unsafe Condition
Reports of cracks emanating from the keyway of the fuel tank access hole, which could result in the loss of the lower wing skin load path and consequent structural failure of the wing.
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Required Actions
Perform a one-time general visual inspection for a keyway in fuel tank access door cutouts 531BB and 631BB. If a keyway is present, conduct a high frequency eddy current (HFEC) inspection for cracking. Depending on the inspection results, modify or repair the keyway profile or crack, as specified.
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Compliance Time
Within 1,000 flight cycles after the effective date of this AD or before the accumulation of 7,500 total flight cycles, whichever occurs later.
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Affected Aircraft
The Boeing Company Model 737-900ER series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 737-57A1308, Revision 1, dated October 1, 2009.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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