# SDR CA131021004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2013
- Submitted: September 14, 2015
- Operation: General aviation
- Engine: Pwc PT6C67C
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Unknown
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA131021004

## Discrepancy

(CAN) THE ACFT HAD AN EMERGENCY LANDING AFTER 1.2 HRS.  FLIGHT DUE TO SUDDEN YAW TO THE LT DURING CRUISE AT 130 KTS FOLLOWED BY KNOCKING/BANGING/POPPING SOUND.  THE ACFT SYS IS SHOWING TORQUE SPLIT AND TORQUE OSCILLATION BEFORE LANDING.  AWAITING RESULTS OF THE ENGINE BORESCOPE INSPECTION AND THE ENGINE DATA DOWNLOAD ANALYSIS.

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