# SDR HYIA20170403001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2017
- Submitted: April 3, 2017
- Operation: Air carrier
- Aircraft: [N890CA](https://openairdocs.org/aircraft/N890CA), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0006
- Aircraft time: 13,533 hours, 25,643 cycles
- Engine: Cont TSIO520VB
- Engine time: 1,956 hours, 2,717 cycles
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Condition: Cracked
- Location: Nr 6 Cylinder
- Part time: 1,956 hours, 2,717 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20170403001

## Discrepancy

PILOT REPORTED A VIBRATION FROM THE RIGHT ENGINE, 30-40 SECONDS INTO FLIGHT.  MAINTENANCE INSPECTED AND FOUND THE RIGHT ENGINE NR 6 CYLINDER TO HAVE LOW COMPRESSION AND THE EXHAUST VALVE SHOWING SIGNS OF CRACKING.  REPLACED THE CYLINDER AND OPS CHECKED GOOD.

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