# SDR 98ZZZX99

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 22, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N73671](https://openairdocs.org/aircraft/N73671), registered now
- Make and model: Cessna 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (OpenAirDocs)
- Aircraft serial: 17267605
- Engine: Lyc O320H2AD
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Coil
- Part number: ES103827901
- Condition: Cracked
- Location: Magneto
- Component: Electrosys, D4RN2021
- 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/98ZZZX99

## Discrepancy

DURING 500-HOUR INSPECTION, (PULLED AT 452.2 HOURS TSO), BOTH COILS IN TCM 2000 SERIES MAGNETO WERE FOUND CRACKED.  COILS HAD THE FOLLOWING MARKINGS:  38/95 AND 8-9, 35/75 AND 10-10.  MAGNETO WAS OVERHAULED BY ELECTROSYSTEMS, INC., FOR LYCOMING.  ENGINE OVERHAULED ON 8-15-96.  SUSPECT CAUSE IS MANUFACTURING DEFECT OR DESIGN FLOW.

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