# SDR CA120807001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2012
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Bell 206B
- Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (OpenAirDocs)
- Engine: Allsn 250C20B
- System (JASC): [6230 · Main Rotor Mast/Swashplate](https://openairdocs.org/jasc/6230)
- Part: Bearing
- Part number: 206040036103
- Condition: Failed
- Location: M/R Mast
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA120807001

## Discrepancy

(CAN) DURING 100HR INSPECTION, METAL FOUND ON ALL 3 M/R TRANSMISSION MAGNETIC CHIP DETECTORS.  NOT ENOUGH METAL FOR A COCKPIT CHIP INDICATION.  METAL ALSO FOUND IN M/R GEARBOX OIL FILTER.  TRANSMISSION ASSY AND MAST ASSY REMOVED FOR INSPECTION, M/R MAST BEARING INNER RACE FOUND SPALLING.  BEARING REPLACED WITH NEW. TRANSMISSION AND TRANSMISSION OIL COOLER FLUSHED TO REMOVE METAL CONTAMINATION.

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