# SDR 2010FA0000189

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2010
- Submitted: February 26, 2010
- Operation: General aviation
- Aircraft: N888NK
- Make and model: Lancar LC41550FG
- Aircraft serial: 400411121
- Aircraft time: 154 hours
- Engine: Cont TSIO550C
- Engine time: 154 hours
- System (JASC): [7421 · Spark Plug/Igniter](https://openairdocs.org/jasc/7421)
- Part: Spark Plug
- Part number: RHB32S
- Condition: Broken
- Location: Nr 4 Cylinder
- Part time: 154 hours
- Stage of operation: CR
- How discovered: 9
- Nature of condition: R, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2010FA0000189

## Discrepancy

ONE SPARK PLUG CERAMIC WAS FOUND BROKEN. OTHERS WERE FOUND CRACKED.  THESE SPARK PLUGS WERE MIS-FIRING DURING HIGH POWER OPERATION.  NO DEFECT WAS NOTED DURING NORMAL GROUND ENGINE RUN UP MAGNETO CHECK.

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