AD 2018-21-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Cracking in the station (STA) 259.5 bulkhead frame web from the first stiffener above stringer S-10 to S-13, which could result in reduced structural integrity of the airplane.
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Required Actions
Perform repetitive inspections of the STA 259.5 bulkhead frame web from the first stiffener above stringer S-10 to S-13, on the left and right sides of the airplane, and applicable on-condition actions.
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Compliance Time
Within 12 months after the effective date of this AD, or within 100 flight cycles after the effective date of this AD, whichever occurs later.
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Affected Aircraft
All The Boeing Company Model 737-100, -200, -200C, -300, -400, -500 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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