# SDR 99ZZZX597

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N9669R](https://openairdocs.org/aircraft/N9669R), registered now
- Make and model: Beech G18S
- Registry model: [Beech G18S](https://openairdocs.org/model/beech-g18s) (OpenAirDocs)
- Aircraft serial: BA495
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 71166
- Condition: Broken
- Location: Exhaust
- Stage of operation: NR
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX597

## Discrepancy

PILOT FELT DIFFFERENT VIBRATION ON A SHORT PART 91 FLIGHT.  A COLD CYLINDER CHECK WAS DONE, AND NR 8 FOUND TO BE COLD. REMOVED CYLINDER AND FOUND PART OF VALVE FACE BROKEN OFF.  POSSIBLY DUE FROM OLD AGE.  CHANGED CYLINDER AND PISTON.

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