# SDR 2022FA0000352

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2022
- Submitted: July 17, 2022
- Operation: General aviation
- Aircraft: [N118YL](https://openairdocs.org/aircraft/N118YL), registered now
- Make and model: Robsin R44RAVENII
- Aircraft serial: 10399
- Aircraft time: 1,979 hours
- Engine: Lyc IO540AE1A5
- Engine time: 4,179 hours
- System (JASC): [7100 · Powerplant System](https://openairdocs.org/jasc/7100)
- Part: Exhaust Valve
- Part number: 17B23935
- Part serial: NA
- Condition: Broken
- Location: Engine
- Part time: 1,979 hours
- Component: Cylinder, Lyc, NA
- Component part number: 05K21120
- Stage of operation: CL
- How discovered: B
- Nature of condition: E, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000352

## Discrepancy

NUMBER ONE CYLINDER EXHAUST VALVE STEM BROKE RELEASING VALVE INTO CYLINDER.

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