# SDR 2012FA0000744

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 2, 2012
- Submitted: November 5, 2012
- Operation: General aviation
- Aircraft: [N587CP](https://openairdocs.org/aircraft/N587CP), registered now
- Make and model: Cirrus SR22
- Registry model: [Cirrus SR22](https://openairdocs.org/model/cirrus-design-sr22) (OpenAirDocs)
- Aircraft serial: 3354
- Aircraft time: 525 hours
- Engine: Cont IO550N
- Engine time: 316 hours
- Propeller: Hartzl PHCJ3YF1
- System (JASC): [7421 · Spark Plug/Igniter](https://openairdocs.org/jasc/7421)
- Part: Spark Plug
- Part number: RHB32E
- Condition: Faulty
- Location: Engine
- Part time: 138 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012FA0000744

## Discrepancy

PILOT REPORTED ENGINE WOULD FEEL LIKE IT WAS GETTING A MISS IN FLIGHT.   PERFORMED A RESISTANCE CHECK OF THE PLUGS AND FOUND HALF OF THEM TO BE AT LEAST 10 TIMES OVER THE SERVICE LIMIT RESISTANCE VALUES FOR THE SAME PN FOR A TEMPEST PLUG.  THE ENTIRE SET OF SPARK PLUGS WERE R & R WITH TEMPEST OF THE SAME PN AND THE PROBLEM WAS CORRECTED.

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