# SDR 97ZZZX3422

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Engine: Lyc O320E3D
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Part number: 75068
- Condition: Broken
- Location: Nr 3 Cyl Exh
- Stage of operation: CR
- Nature of condition: E, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX3422

## Discrepancy

PILOT EXPERIENCED LOSS OF POWER DURING CRUISE FLIGHT.  EXCESSIVE VIBRATION AND POWER LOSS LED HIM TO  MAKE A PRECAUTIONARY/EMERG LANDING IN WHICH AIRCRAFT WAS HEAVILY DAMAGED.  FAA/NTSB INSPECTED ENGINE, FOUND NR 3 CYLINDER EXHAUST VALVE BROKEN OFF AT BASE OF VALVE, AND VALVE HEAD BLOCKING EXHAUST IN STACK FROM NR 4 CYLINDER.

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