# SDR 8MHR201612141305

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 14, 2016
- Submitted: December 14, 2016
- Operation: General aviation
- Filed by: [Keystone Turbine Services, LLC, repair station 8MHR895B](https://openairdocs.org/faa-repair-station/8MHR895B/keystone-turbine-services-llc.md) (OpenAirDocs)
- Make and model: Bell
- Engine: Rroyce
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Shaft
- Part number: 23038136
- Part serial: WN53592
- Condition: Cracked
- Location: Engine Turbine
- Part time: 730 hours, 1,425 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/8MHR201612141305

## Discrepancy

UPON DISASSEMBLY OF THE ENGINE TO REPAIR FOR REPORTED METAL IN OIL FOUND A CRACK IN THE PT OUTER SHAFT ORIGINATING AT THE CURVIC COUPLING END OF THE SHAFT. THE CRACK EXTENDED APPROXIMATELY 270 DEGREES AROUND THE SHAFT.

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