# SDR 97ZZZX2021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N877CA](https://openairdocs.org/aircraft/N877CA), registered now
- Make and model: Beech 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (OpenAirDocs)
- Aircraft serial: TH1727
- Engine: Cont IO550C
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Bearing
- Part number: M3006
- Condition: Failed
- Location: Mag Drive
- Part time: 1,385 hours
- Component: Slick, 6310
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX2021

## Discrepancy

PILOT REPORTED LEFT ENGINE LEFT MAGNETO WAS 'DEAD' ON RUN-UP.  REMOVED MAGNETO AND OPENED UP FOR INSPECTION.  FOUND INTERNAL DAMAGE - MATERIAL BEING WORN AWAY BY ROTATING MAGNET.  FURTHER DISASSEMBLY REVEALED DRIVE END BEARING P/N M3006 BALL RETAINER CAGE AND GREASE SEAL GONE - BEARING WAS DRY WHICH MAY HAVE LEAD TO FAILURE.  NEW MAGNETO INSTALLED ON AIRCRAFT AND RETURNED TO SERVICE.

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