# SDR BQVR20111129

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2012
- Submitted: November 29, 2012
- Operation: General aviation
- Aircraft: [N68195](https://openairdocs.org/aircraft/N68195), registered now
- Make and model: Cessna 152
- Registry model: [Cessna 152](https://openairdocs.org/model/cessna-152) (OpenAirDocs)
- Aircraft serial: 82177
- Aircraft time: 13,050 hours
- Engine: Lyc O235L2C
- Engine time: 4,763 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Part number: 17B23940
- Condition: Worn
- Location: Engine
- Part time: 60 hours
- Component: Cylinder, Lyc
- Component part number: 05K23037
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BQVR20111129

## Discrepancy

PREMATURE EXHAUST VALVE WEAR DETECTED BY LOW COMPRESSION/ EXHAUST VALVE LEAKAGE.  EXCESSIVE WEAR STEP FOUND ON THE FACES OF THE LOW TIME EXHAUST VALVES.  THE EXHAUST VALVES FROM ALL 4 CYLINDERS ARE AFFECTED.  FURTHER ENGINE EVALUATION IN PROGRESS.

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