AD 2013-19-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; the Boeing Company Airplanes |
Unsafe Condition
Cracks found in the skin at body station (STA) 540 just below stringer S-22L, which can result in fatigue cracking in the skin and rapid decompression of the cabin.
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Required Actions
Conduct repetitive detailed and high frequency eddy current inspections for cracking of the skin around the eight fasteners common to the ends of the STA 540 bulkhead chords between stringers S-22 and S-23, left and right sides. Perform corrective actions and preventive modifications if necessary.
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Compliance Time
Within 18,000 total flight cycles with a grace period of 4,000 flight cycles for airplanes with less than 27,500 total flight cycles.
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Affected Aircraft
The Boeing Company Model 737-600, -700, -700C, -800, and -900 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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