# SDR 2009FA0000049

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2009
- Submitted: February 2, 2009
- Operation: General aviation
- Aircraft: [N258SD](https://openairdocs.org/aircraft/N258SD), registered now
- Make and model: Raythn G58RAYTHEON
- Aircraft serial: TH2137
- Aircraft time: 745 hours
- Engine: Cont IO550C
- Engine time: 745 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Part number: 655771
- Condition: Broken
- Location: Nr 2 Engine
- Part time: 745 hours
- Stage of operation: DE
- 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/2009FA0000049

## Discrepancy

IN FLIGHT HEARD A LOUD NOISE FROM THE NR 2 ENGINE. ENGINE CONTINUED TO OPERATE BUT AT A REDUCED POWER OUTPUT. UPON INSPECTION FOUND ONE HALF OF THE EXHAUST VALVE FACE BROKEN OFF REQUIRING REPLACEMENT OF THE PISTON AND CYLINDER ASSEMBLY.

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