# SDR KC2R2014FA0000392

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 6, 2014
- Submitted: June 20, 2014
- Operation: General aviation
- Aircraft: N7861A
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- Aircraft serial: 17280098
- Engine: Lyc IO360L2A
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Impulse Coupling
- Part number: M3163
- Condition: Cracked
- Location: Magneto
- Part time: 734 hours
- Component: Magneto
- Component part number: 4371
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KC2R2014FA0000392

## Discrepancy

DURING PERFORMANCE OF A ROUTINE 500 HR INSPECTION OF MAGNETO, A CRACK WAS DISCOVERED IN IMPULSE COUPLING BASE PLATE, IN LINE WITH FLYWEIGHT AXLE.  CRACK DISCOVERED DURING NDT "MAG PARTICLE INSPECTION" OF PART.  IMPULSE WES REPLACED WITH NEW PART.

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