AD 2017-20-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Initiation of new fatigue cracking in the fuselage skin of the crown skin panel along locally thinned channels adjacent to the chem-milled steps.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Add repetitive inspections for cracking in additional areas, and repair if necessary. Remove airplanes from the applicability. Add an optional skin panel replacement, which terminates all inspections. Add an optional preventive modification, which terminates certain inspections. Reduce the compliance time for certain 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, -200CB, and -300 series airplanes, with specific serial numbers and configurations as detailed in the AD.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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