AD Amdt-39-15179
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company CF34-1A | Airworthiness Directives; General Electric Company CF34-1A, -3A, -3A1, -3A2, -3B, and -3B1 Turbofan Engines |
Unsafe Condition
Electrical arc-out indications on fan disks could lead to an uncontained fan disk failure and airplane damage.
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Required Actions
Perform on-wing TEV inspection of fan disks for electrical arc-out defects on fan disks installed on regional jets within 500 flight hours after the effective date. Conduct shop-level FPI, enhanced TEV, and ECI inspections for cracks and electrical arc-out defects on all affected fan disks. Use the service information from the referenced ASBs to perform these actions.
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Compliance Time
Within 500 flight hours after the effective date for on-wing TEV inspections; shop-level inspections vary based on fan disk operating hours and calendar years as outlined in Table C.
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Affected Aircraft
General Electric Company CF34-1A, -3A, -3A1, -3A2, -3B, and -3B1 turbofan engines, as listed by serial number and part number in the referenced ASBs.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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