AD 2017-12-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
The frame webs between stringers S-20 and S-25 are subject to widespread fatigue damage (WFD), which could result in reduced structural integrity of the airplane.
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Required Actions
Inspect the frame webs for any crack in any open coordinating holes, tooling holes, and insulation blanket attachment holes using high frequency eddy current (HFEC) inspections. Repair any cracks if necessary. Modify the frame webs at all open hole locations to terminate repetitive 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 757-200 and -200PF series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 757-53A0103, dated June 22, 2016. The installation of Supplemental Type Certificate (STC) ST01518SE does not affect the applicability of this AD.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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