# SDR 97ZZZX2816

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N72742](https://openairdocs.org/aircraft/N72742), registered now
- Make and model: Cessna 140
- Registry model: [Cessna 140](https://openairdocs.org/model/cessna-140) (OpenAirDocs)
- Aircraft serial: 9921
- Engine: Cont C8512
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Part number: 646612
- Condition: Leak
- Location: Engine
- Part time: 40 hours
- Component: 653426A13
- 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/97ZZZX2816

## Discrepancy

FORTY HOURS AFTER CYLINDER ASSY REPLACED, ALLL EXHAUST VALVES WERE LEAKING ON COMPRESSION CHECK ON ALL 4 CYLINDERS.

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