AD 2021-25-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Cracking in the fuselage crown skin panels, which could lead to decompression or loss of structural integrity of the airplane.
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Required Actions
Perform repetitive non-destructive inspections for cracking, replace certain fuselage crown skin panels, and applicable on-condition actions, including a general visual inspection of certain repairs for any loose or missing fasteners, a low frequency eddy current (LFEC) inspection of certain repairs for cracking, and repair.
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Compliance Time
Within 507 work-hours or 143 inspection cycles, whichever occurs first.
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Affected Aircraft
The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 737-53A1358, Revision 1, dated February 26, 2021.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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