# SDR 95ZZZX2734

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 18, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N8115H](https://openairdocs.org/aircraft/N8115H), registered now
- Make and model: Piper PA-28-161
- Registry model: [Piper PA-28-161](https://openairdocs.org/model/piper-pa-28-161) (OpenAirDocs)
- Aircraft serial: 288016117
- Engine: Lyc O320D3G
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Condition: Failed
- Location: Nr 4
- Stage of operation: CL
- Nature of condition: E, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX2734

## Discrepancy

PILOT DECLARED AN EMERGENCY SHORTLY AFTER TAKEOFF DUE TO ROUGH RUNNING ENGINE.  FOUND NR 4 CYLINDER HAD .50 INCH DIAMETER PIECE OF ALUMINUM BURNED OUT NEAR EXHAUST VALVE SEAT.  POSSIBLY CAUSED BY PRE-IGNITION OR DETONATION.  APPROXIMATELY 300 HOURS PRIOR, ENGINE WAS CRACKING THE PORECELAIN IN THE SPARK PLUGS.  MOST LIKELY HAPPENED DUE TO IMPROPER LEANING.

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