AD 2017-11-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Cracking of certain lugs on the rear spar and horizontal stabilizer, which could result in the loss of structural integrity and controllability of the airplane.
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Required Actions
Perform repetitive detailed, high frequency eddy current (HFEC), and ultrasonic inspections of the center section rear spar upper clevis lugs and horizontal stabilizer rear spar upper lugs for cracking. Conduct related investigative and corrective actions if necessary. Replace the center section rear spar upper chord as applicable.
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Compliance Time
Within the specified intervals as outlined in Boeing Alert Service Bulletin 737-55A1033, Revision 2, or subsequent to the spar chord replacement.
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Affected Aircraft
The Boeing Company Model 737-100, -200, and -200C series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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