# SDR AUS20030020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 10, 2003
- Submitted: February 10, 2003
- Operation: General aviation
- Make and model: Cessna U206G
- Registry model: [Cessna U206G](https://openairdocs.org/model/cessna-u206g) (OpenAirDocs)
- Engine: Cont IO520F
- Propeller: Mcauly D3A32C90
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Part number: 655771
- Condition: Worn
- Location: Reciprocating En
- Part time: 919 cycles
- Component: Reciprocating En, Cont, IO520F
- 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/AUS20030020

## Discrepancy

(AUS) NO4 CYLINDER EXHAUST VALVE SEAT LEAKING. FOLLOWING VALVE REMOVALSEVERE EROSION WAS THEN FOUND ON THE NECK OF THE VALVE. NO5 CYLINDER EXHAUST VALVE WAS ALSO FOUND TO HAVE A SIMILAR EROSION PROBLEM. ALL OTHER VALVES WERE CHECKED AND FOUND TO BE IN NORMALCONDITION.

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