# SDR AU510001699

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2005
- Submitted: June 6, 2006
- Operation: General aviation
- Make and model: Piper PA-31
- Registry model: [Piper PA-31](https://openairdocs.org/model/piper-pa-31) (OpenAirDocs)
- Engine: Lyc TIO540A2C
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Bearing
- Part number: 10353060
- Condition: Failed
- Location: Magneto
- Component: Magneto
- Component part number: LW349310170
- 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/AU510001699

## Discrepancy

LT ENGINE RT MAGNETO FAILED.  INVESTIGATION FOUND THE MAGNETO BEARING HAD COLLAPSED.  HEAT GENERATED DISCOLORED THE CAM ASSEMBLY AND MELTED THE PLASTIC BLOCK ON THE CONTACT ASSEMBLY CAUSING THE CONTACTS TO STAY CLOSED.  SUSPECT CAUSED BY INCORRECT LUBRICATION OF BEARING.

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