# SDR AU990939

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Robsin R22BETA
- Engine: Lyc O320B2C
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve Seat
- Condition: Loose
- Location: Engine
- Stage of operation: CR
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU990939

## Discrepancy

(AUS) NR 1 CYLINDER EXHAUST VALVE SEAT DISLODGED AND HELD THE EXHAUST VALVE OPEN ALLOWING IT TO BE CONTACTED BY THE PISTON WHICH THEN SNAPPED THE VALVE HEAD OFF.  DAMAGE TO NR 1 CYLINDER AND CONNECTING ROD.

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