# SDR ECPR20260731002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 30, 2026
- Submitted: July 31, 2026
- Operation: General aviation
- Aircraft: [N8585Z](https://openairdocs.org/aircraft/N8585Z), registered now
- Make and model: Piper PA-28R-201
- Registry model: [Piper PA-28R-201](https://openairdocs.org/model/piper-pa-28r-201) (OpenAirDocs)
- Aircraft serial: 2844163
- Aircraft time: 4,451 hours
- Engine: Lyc IO360C1C6
- Engine time: 4,462 hours
- System (JASC): [7421 · Spark Plug/Igniter](https://openairdocs.org/jasc/7421)
- Part: Spark Plug
- Part number: UREM38E
- Condition: Cracked
- Location: Zone 400
- Component: Cylinder, Lyc
- Component part number: LW12993
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ECPR20260731002

## Discrepancy

FOLLOWING DISCOVERY OF A CRACKED SPARK PLUG ON ANOTHER AIRCRAFT, A PRECAUTIONARY INSPECTION WAS CONDUCTED OF THE SPARK PLUG ON THIS AIRCRAFT AS IT WAS THE SAME LOT # AS A PREVIOUS SPARK PLUG FAILURE.  VISUAL INSPECTION FOUND CRACKING AT A POINT BETWEEN THE SPARK PLUG GASKET BOSS AND THE HEXAGONAL NUT PORTION (WHAT TEMPEST REFERS TO AS THE HOT LOCK ASSEMBLY). THE AIRCRAFT HAD NOT FLOWN SINCE THIS SPARK PLUG WAS INSTALLED AT ITS SCHEDULED INSPECTION.

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