# SDR 97ZZZX3844

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 30, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N7475Q
- Make and model: Amtr SEAREY
- Aircraft serial: 1DK028
- Engine: Rotax ROTAX912
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Seal
- Condition: Failed
- Location: Nr 3 Cyl Exh Vlv
- Part time: 32 hours
- Stage of operation: NR
- Nature of condition: E, R
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX3844

## Discrepancy

NUMEROUS PILOT LOG BOOK REPORTS OF A ROUGH RUNNING ENGINE.  ATTEMPTS TO CORRECT BY REPLACING SPARK PLUGS, LEADS, FUEL FILTER, ETC., DID NOT CORRECT PROBLEM.  INVESTIGATION DISCLOSED THAT BOTH SPARK PLUGS IN NR 3 CYLINDER WERE OIL SOAKED.  IT APPEARED THE EXHAUST VALVE STEM SEAL ON NR 3 CYLINDER HAD FAILED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.