AD 94-07-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | ATP | Airworthiness Directives; Jetstream Model ATP Airplanes |
Unsafe Condition
Fatigue-related cracking and loose rivets in the subframe yoke assemblies of the quick engine change units (QECU) on both wings could lead to loss of structural integrity of the engine mount.
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Required Actions
Inspect subframe yoke assemblies for cracking and loose rivets within 750 hours time-in-service after the effective date. Replace loose rivets and repair or replace cracked yoke assemblies as specified. Perform subsequent inspections at intervals not exceeding 250 or 35 hours time-in-service based on crack length, or eddy current inspections unless a visual inspection is allowed for units with less than 500 hours since last eddy current inspection.
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Compliance Time
Within 750 hours time-in-service after the effective date of this AD
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Affected Aircraft
All Model ATP airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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