# SDR 99ZZZX599

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N190MG
- Make and model: Cessna 414A
- Registry model: [Cessna 414A](https://openairdocs.org/model/cessna-414a) (OpenAirDocs)
- Aircraft serial: 414A0639
- Engine: Cont TSIO520NB
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve Spring
- Part number: 637837
- Condition: Broken
- Location: Nr 1 Cylinder
- Part time: 145 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX599

## Discrepancy

UPON REMOVAL OF CYLINDER NR 1, THE INNER VALVE SPRING P/N 631521 AND OUTER VALVE SPRING P/N 637837 WERE FOUND BROKEN.  THE OUTER VALVE SPRING P/N 637837 ON CYLINDER NR 3 WAS FOUND BROKEN.  CAUSE IS UNKNOWN.  OWNER COMPLAINED OF EXCESSIVE ENGINE VIBRATION.

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