AD 2017-23-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Cracks found in the lower chord of the left wing rear spar and lower aft skin at wing buttock line (WBL) 157, which could lead to the inability of the lower chord of the rear spar to sustain limit load and adversely affect structural integrity.
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Required Actions
Conduct repetitive low frequency eddy current (LFEC) inspections for cracking of the lower chord of the rear spar and detailed inspections for cracking of the lower aft skin at WBL 157. Take applicable on-condition actions, such as repair, if cracks are detected.
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Compliance Time
Before further flight
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Affected Aircraft
The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes, certificated in any category. Supplemental Type Certificate (STC) ST01219SE does not affect applicability.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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