# SDR 2022FA0000440

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 25, 2022
- Submitted: August 9, 2022
- Operation: General aviation
- Aircraft: [N3055Y](https://openairdocs.org/aircraft/N3055Y), registered now
- Make and model: Robsin R44RAVENII
- Aircraft serial: 11861
- Aircraft time: 3,579 hours
- Engine: Lyc IO540AE1A5
- Engine time: 5,065 hours
- System (JASC): [8500 · Engine (Reciprocating)](https://openairdocs.org/jasc/8500)
- Part: Exhaust Valve
- Part number: 17B23935
- Condition: Broken
- Location: Zone 400
- Part time: 1,379 hours
- Stage of operation: DE
- How discovered: B
- Nature of condition: E, R
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000440

## Discrepancy

EXHAUST VALVE BROKE AT STEM AND ENGINE SUFFERED PARTIAL LOSS OF POWER.

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