# SDR 2013FA0000302

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2013
- Submitted: May 31, 2013
- Operation: General aviation
- Aircraft: [N402HG](https://openairdocs.org/aircraft/N402HG), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C1016
- Engine: Cont TSIO520VB
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve Spring
- Condition: Broken
- Location: Cylinder
- Component: Cylinder, Eci
- Component part number: TISN712BCA
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2013FA0000302

## Discrepancy

RIGHT ENGINE BEGAN TO VIBRATE ON SHORT FINAL.  FOUND BROKEN INNER AND OUTER EXHAUST VALVE SPRINGS AND BROKEN INTAKE VALVE INNER SPRING ON THE NR 5 CYLINDER.  PULLED ROCKER BOX COVERS AND FOUND THE INNER INTAKE AND EXHAUST VALVE SPRINGS BROKEN ON 11 OF 12 CYLINDERS.  CYLINDER, TISN71.2BCA, HAD ACCULATED 8.3 HRS SINCE NEW.

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