AD 2017-04-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Fatigue cracking of the upper-frame-to-side-frame splice of the fuselage, which could result in reduced structural integrity of the frame and adjacent lap joint, causing increased loading in the fuselage skin, accelerating skin crack growth, and potentially leading to decompression of the airplane.
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Required Actions
Inspect to determine if the existing frame repair meets all specified requirements; modify a certain splice to terminate repetitive inspections; reduce inspection thresholds and repetitive intervals; and perform post-repair/post-modification inspections.
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Compliance Time
Within 50 flight hours after the effective date of this AD.
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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 737-53A1261, Revision 1, dated January 30, 2015.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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