# SDR HYIA20141124001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 20, 2014
- Submitted: November 24, 2014
- Operation: Air carrier
- Aircraft: [N5826C](https://openairdocs.org/aircraft/N5826C), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0050
- Aircraft time: 32,713 hours, 6,469 cycles
- Engine: Cont TSIO520VB
- Engine time: 2,563 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Condition: Broken
- Location: Rt Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20141124001

## Discrepancy

WHILE IN CRUISE POWER, COULD FEEL AN ENG STARTING TO RUN ROUGH.  UNTIL THE RT OIL PRESS & RT CYLINDER HEAD TEMPERATURE STARTED TO DROP HE WAS UNSURE WHICH SIDE.  IT WAS APPROX 3 - 4MIN FROM WHEN HE FIRST FELT THE ROUGHNESS UNTIL THE RT ENG OIL PRESS & CYLINDER HEAD TEMPERATURE STARTED TO DROP.  THE OIL PRESS DID FALL TO 0 & THE ENG WAS SHUTDOWN.  IT WAS ALSO REPORTED BY A PAX THAT THERE WERE SPARKS COMING FROM THE BACK OF THE ENG.  AN EMER WAS DECLARED & THE PLANE LANDED SAFELY.  INITIAL INVESTIGATION INDICATES A BROKEN EXHAUST VLV IS THE SOURCE OF THE PROBLEM.  MX IS ON SITE.  THE ENG IS BEING R & R, SENT FOR TEARDOWN.

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