# SDR 98ZZZX3138

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N901VL
- Make and model: Bnorm BN2AMK3
- Aircraft serial: 1003
- Engine: Lyc O540E4C5
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Condition: Loose
- Location: Lt Engine
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX3138

## Discrepancy

PILOT REPORTED VIBRATION ON LEFT ENGINE.   COMPRESSION PERFORMED AND FOUND CYLINDER NR 4 LOW.  CYLINDER REMOVED AND FOUND EXHAUST VALVE SEAT LOSE AND PISTON DAMAGED BY THE VALVE.  CYLINDER REPLACED.  REPAIR STATION NOTIFIED ABOUT THE INCIDENT AND THEY ARE GOING TO MAKE AN INVESTIGATION.

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