# SDR HYIA20200227002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 2020
- Submitted: February 27, 2020
- Operation: Air carrier
- Aircraft: [N247GS](https://openairdocs.org/aircraft/N247GS), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: C4020637
- Aircraft time: 30,837 hours, 35,071 cycles
- Engine: Cont TSIO520VB
- Engine time: 990 hours, 1,378 cycles
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 658552A2
- Part serial: AC18KB746
- Condition: Broken
- Location: Nr 6
- Part time: 990 hours, 1,378 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20200227002

## Discrepancy

PILOT REPORTED ROUGH RUNNING RIGHT ENGINE ON CLIMB OUT.  MAINTENANCE INSPECTED AND FOUND THE NUMBER 6 CYLINDER EXHAUST VALVE TO BE BROKEN AND THE NUMBER 4 CYLINDER DAMAGED.  REPLACED BOTH CYLINDERS AND RELEASED TO SERVICE.

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