# SDR CA050323006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2005
- Submitted: May 2, 2005
- Operation: General aviation
- Make and model: Aerosp ATR-42
- Registry model: [Aerosp ATR-42](https://openairdocs.org/model/aerospatiale-atr-atr-42) (OpenAirDocs)
- Engine: Pwa PW121
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Malfunctioned
- Stage of operation: AP
- How discovered: O
- Nature of condition: E, J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA050323006

## Discrepancy

(CAN) ON APPROACH THE ENGINE EXPERIENCED AN UNCOMMANDED POWER (TORQUE) REDUCTION ACCOMPANIED BY A LOUD NOISE AND LOSS OF ENGINE OIL PRESSURE.  THE CREW SECURED THE ENGINE IN FLIGHT AND ACCOMPLISHED A SINGLE-ENGINE LANDING.  SUBSEQUENT INSPECTION REVEALED DAMAGE TO THE TURBO MACHINE.  MFG WILL MONITOR THE INVESTIGATION OF THIS EVENT AND WILL ADVISE OF ROOT CAUSE ONCE DETERMINED.

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