# SDR 2022FA0000728

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2022
- Submitted: November 23, 2022
- Operation: General aviation
- Aircraft: [N1637Y](https://openairdocs.org/aircraft/N1637Y), registered now
- Make and model: Cessna 172C
- Registry model: [Cessna 172C](https://openairdocs.org/model/cessna-172c) (OpenAirDocs)
- Aircraft serial: 172493337
- Engine: Cont O300D
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Condition: Stuck
- Location: Nr 3 Cylinder
- Stage of operation: NR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000728

## Discrepancy

DURING ANNUAL INSPECTION COMPRESSION TEST, NONE FOUND IN #3 CYLINDER.  DISASSEMBLED, DETERMINED EXHAUST VALVE STUCK IN GUIDE DUE CARBON BUILD UP.  CLEANED VALVE AND GUIDE, RE-ASSEMBLED, RE-INSTALLED, OPERATION SATISFACTORY

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