AD 2012-26-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
| engine | Rolls-Royce | engines | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Loose fasteners and cracks at the joint common to the aft torque bulkhead and strut-to-diagonal brace fitting, including one report of such damage occurring less than 3,000 flight cycles after the last inspection.
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Required Actions
Inspect the shim installation between the drag brace fitting vertical flange and bulkhead, and repair if necessary. Inspect for cracking of the four critical fastener holes in the horizontal flange, and repair if necessary. Perform detailed inspections for cracking of the bulkhead, and repair if necessary. Allow an extension of repetitive intervals by performing ultrasonic inspections for cracking of the bulkhead, and repair if necessary. Provide an option for high frequency eddy current inspection for cracking of the critical fastener holes, and repair if necessary. Add a terminating action for certain repetitive inspections.
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Compliance Time
Within 54 months of the effective date
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Affected Aircraft
The Boeing Company Model 757-200, -200PF, and -200CB series airplanes powered by Rolls-Royce engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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