# SDR 99ZZZX2494

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 17, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N288JB](https://openairdocs.org/aircraft/N288JB), registered now
- Make and model: Bell 206L-3
- Registry model: [Bell 206L-3](https://openairdocs.org/model/bell-206l-3) (OpenAirDocs)
- Aircraft serial: 51288
- Engine: Allsn 250C30P
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Bearing
- Part number: 6898607
- Condition: Failed
- Location: Compressor
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX2494

## Discrepancy

DURING FLIGHT, THE 'ENGINE CHIP LIGHT' WARNING LIGHT ILLUMINATED.  DURING A 30-MINUTE GROUND RUN FOR TROUBLESHOOTING THE CHIP LIGHT AGAIN ILLUMINATED.  THE ENGINE WAS DISASSEMBLED AND THE NR 1 BEARING WAS FOUND TO HAVE FAILED CAUSING IMPELLER TO CONTACT THE SHROUD.  STRESS LOADING ON THIS BEARING UNDER NORMAL OPERATIONS COMBINED WTIH HEAT CYCLING CAUSES IT TO FAIL.

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