# SDR BONA201709250001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2017
- Submitted: September 25, 2017
- Operation: Air carrier
- Aircraft: [N45YF](https://openairdocs.org/aircraft/N45YF), registered now
- Make and model: Lear 45LEAR
- Aircraft serial: 45006
- Aircraft time: 6,780 hours, 4,651 cycles
- Engine: Hnywl TFE73120AR
- Engine time: 6,739 hours, 4,586 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Part number: 30600823
- Part serial: P111132C
- Condition: Making Metal
- Location: Not Reported
- Part time: 6,739 hours, 4,651 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: X, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BONA201709250001

## Discrepancy

PILOT OBSERVED A CHIP DETECTION CAS MESSAGE ON THE ENGINE.  SHORTLY AFTER, THE ENGINE SHUTDOWN WITHOUT BEING COMMANDED.  FOUND SUBSTANTIAL DEBRIS ON THE CHIP DETECTOR AND IN OIL DRAINED FROM THE TRANSFER GEARBOX.

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