# SDR HYIA20190315004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 26, 2019
- Submitted: March 15, 2019
- Operation: Air carrier
- Aircraft: [N3249M](https://openairdocs.org/aircraft/N3249M), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: C4020296
- Aircraft time: 29,896 hours
- Engine: Cont TSIO520VB
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Condition: Broken
- Location: Rt Engine
- Part time: 1,408 hours
- Component: Cylinder, Cont
- Component part number: 658175A2BP
- Stage of operation: CR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20190315004

## Discrepancy

PILOT REPORTED RIGHT ENGINE RUNNING ROUGH IN FLIGHT WITH ONE INCH MAP FLUCTUATION INTERMITTENT. MAINTENANCE INSPECTED AND FOUND THE EXHAUST VALVE DISCOLORED AND BROKEN. THE CYLINDER WAS REPLACED WITH NO FURTHER DEFECTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.