AD 2008-08-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 757 | Airworthiness Directives; Boeing Model 757 Airplanes |
Unsafe Condition
Cracks at the anchor tab of the bulkhead seal assemblies of the wing thermal anti-ice (TAI) system at certain outboard stations of the left and right wings, which could lead to separation of the anchor tab and bulkhead seal assembly. This could result in insufficient airflow to the wing TAI system, causing ice accumulation on the wings and reduced controllability in icing conditions.
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Required Actions
Inspect the anchor tab of the bulkhead seal assemblies for cracks at specified outboard stations of the left and right wings. Take corrective action if cracks are found. Optional terminating action is provided for the repetitive inspections.
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Compliance Time
Before further flight
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Affected Aircraft
All Boeing Model 757 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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