# SDR 96ZZZX4148

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N4949G](https://openairdocs.org/aircraft/N4949G), registered now
- Make and model: Cessna 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Aircraft serial: 17273496
- Engine: Lyc O320H2AD
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Bearing
- Part number: 1035110
- Condition: Failed
- Location: Mag Rear
- Component: D4RN1021
- 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/96ZZZX4148

## Discrepancy

MAGNETO POINTS WERE NOT OPENING DUE TO EXCESSIVE WEAR ON THE POINTS' CAM FOLLOWER.  THIS WEAR WAS ACCELERATED BY A HEAT BUILD-UP ON THE MAGNETO SHAFT GENERATED BY A FAILED REAR BEARING.

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