# SDR 97ZZZX3695

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N6950V
- Make and model: Mooney M20F
- Registry model: [Mooney M20F](https://openairdocs.org/model/mooney-m20f) (OpenAirDocs)
- Aircraft serial: 221323
- Engine: Lyc IO360A1A
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Condition: Stuck
- Location: Eng Nr 4 Exhaust
- 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/97ZZZX3695

## Discrepancy

ENGINE RAN ROUGH AT TAKEOFF, AIRCRAFT LOST POWER.  AIRCRAFT SUSTAINED SUBSTANTIAL DAMAGE DURING A FORCED LANDING.  EXAMINATION FOR THE ENGINE REVEALED AN OPEN EXHAUST VALVE, CYLINDER NR 4.  ENGINE HAD A CYLINDER, NR 4 EXHAUST VALVE STUCK.

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