# SDR 2025FA0000713

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2025
- Submitted: October 14, 2025
- Operation: General aviation
- Aircraft: [N739DB](https://openairdocs.org/aircraft/N739DB), registered now
- Make and model: Cessna 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Aircraft serial: 17270451
- Engine: Lyc O320D2J
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Condition: Failed
- Location: Nr 3 Cylinder
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2025FA0000713

## Discrepancy

EXHAUST VALVE FAILED DUE TO HEAT STRESS, CAUSING LOW COMPRESSION, LOW ENGINE SPEED AND ENGINE VIBRATIONS WHILE AT CRUISE.

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