# SDR CA980908006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Cessna 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Engine: Lyc O320D2J
- System (JASC): [7421 · Spark Plug/Igniter](https://openairdocs.org/jasc/7421)
- Part: Spark Plug
- Part number: SR88
- Condition: Cracked
- Location: Nr 4 Cylinder
- Stage of operation: LD
- Nature of condition: E, R
- Precautionary procedure: A, B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA980908006

## Discrepancy

(CAN) WHILE DOING CIRCUITS, THE ENGINE BEGAN TO RUN ROUGH WITH PARTIAL POWER LOSS.  THE AIRCRAFT LANDED AND POST-FLIGHT INSPECTION FOUND NR 3 CYLINDER HAD 2 DEAD SPARK PLUGS AND NR 4 CYLINDER HAD A SPARK PLUG WITH BROKEN CERAMIC.  ALL THE ENGINE SPARK PLUGS WERE REPLACED AND THE ENGINE WAS GROUND RUN SERVICEABLE.

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