# SDR 99ZZZX999

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N1370U](https://openairdocs.org/aircraft/N1370U), registered now
- Make and model: Cessna 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (OpenAirDocs)
- Aircraft serial: 17267041
- Engine: Lyc O320E2D
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Breaker
- Part number: M3081
- Condition: Failed
- Location: Magneto
- Component: Slick, 4251
- 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/99ZZZX999

## Discrepancy

500-HOUR MAGNETO INSPECTION ACCOMPLISHED ON RIGHT AND LEFT MAGNETOS, 4200 SERIES.  NEW BREAKER ASSY'S INSTALLED P/N M-3081, MANUFACTURE DATE 9-20-98.  MAGNETOS INTERNALLY TIMED AND RE-ASSEMBLED.  INSTALLED MAGNETO ON ENGINE AND L-TIMING LIGHT WOULD NOT GO OUT WITH POINT OPENING AND CLOSING.  REMOVED MAGNETO, DISASSEMBLED, REPLACED BREAKER ASSY WITH OTHER NEW SET.  INTERNALLY TIMED, RE-ASSEMBLED, AND RE-INSTALLED ON ENGINE WITH NO FURTHER PROBLEMS.  OPERATIONAL CHECKED SATISFACTORY.

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