# SDR 2018FA0000328

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2017
- Submitted: August 1, 2018
- Operation: General aviation
- Make and model: Cessna 210N
- Registry model: [Cessna 210N](https://openairdocs.org/model/cessna-210n) (OpenAirDocs)
- Aircraft serial: P21000355
- Aircraft time: 4,200 hours
- Engine: Allsn 250B17F2
- Engine time: 1,380 hours
- System (JASC): [8300 · Accessory Gearboxes](https://openairdocs.org/jasc/8300)
- Part: Gearbox
- Condition: Fod
- Part time: 1,380 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: W, C, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2018FA0000328

## Discrepancy

HAD A CHIP LIGHT NR 3 ILLUMINATE THREE TIMES IN 10 HOURS OF FLYING.  IT WAS RECOMMENDED THAT BECAUSE THE CHIP DETECTOR IS AN INDICATION OF METAL WEAR THE ENGINE BE REMOVED. ON INSPECTION, A POLISHING STONE WAS FOUND IN THE GEARBOX THAT APPEARED TO BE CAUSING THE PROBLEM.

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