AD 2021-12-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Engine | Alliance Turbofan | Airworthiness Directives; Engine Alliance Turbofan Engines |
Unsafe Condition
The fracture of multiple LPC 1st-stage fan blades due to fatigue cracks originating on the internal surface of the convex airfoil and propagating to the point of failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform initial and repetitive ultrasonic inspections of the affected LPC 1st-stage fan blades and replace any LPC 1st-stage fan blade that fails the inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours
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Affected Aircraft
Engine Alliance GP7270 and GP7277 model turbofan engines with a certain low-pressure compressor (LPC) 1st-stage fan blade installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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