# SDR 2022FA0000175

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2022
- Submitted: March 30, 2022
- Operation: General aviation
- Aircraft: [N9904V](https://openairdocs.org/aircraft/N9904V), registered now
- Make and model: Cessna 172
- Registry model: [Cessna 172](https://openairdocs.org/model/cessna-172) (OpenAirDocs)
- Aircraft serial: 17264553
- System (JASC): [5300 · Fuselage Structure (General)](https://openairdocs.org/jasc/5300)
- Part: None
- Part number: 4371
- Part serial: 21031009
- Condition: Chipped
- Location: Engine
- Part time: 125 hours
- Stage of operation: LD
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000175

## Discrepancy

SLICK MAGNETO LOCKED UP AND CLIPPED A GEAR TOOTH AND METAL SHAVING.  THIS WAS DURING A TRAINING FLIGHT AND OCCURRED JUST AS STUDENT WAS LANDING AS HE HEARD A LOUD NOISE EMITTING FROM THE ENGINE COMPARTMENT.  ON TEAR DOWN. FOUND THAT THE MAGNETO WAS LOCKED, AND ONE GEAR TOOTH WAS CLIPPED, AND METAL FILING WERE FOUND IN THE AREA.

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