AD 2017-18-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce | Corporation | Airworthiness Directives; Rolls-Royce Corporation Turboshaft Engines |
Unsafe Condition
Cracks in the turbine wheel blades of the 3rd-stage and 4th-stage turbine wheels, which could lead to failure of the turbine wheel blades, damage to the engine, and damage to the aircraft.
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Required Actions
Repetitive visual inspections and fluorescent-penetrant inspection (FPI) of 3rd-stage turbine wheels. Remove from service all 4th-stage turbine wheels at the next inspection or turbine shop visit.
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Compliance Time
Within the next turbine shop visit or at the next inspection.
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Affected Aircraft
Rolls-Royce Corporation model 250 turboshaft engines, excluding RRC 250-C300/A1 and 250-C300/B1 engines with 3rd-stage turbine wheel part number RR30000236.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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