# SDR 99ZZZX2722

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N962CC
- Make and model: Cessna 210R
- Registry model: [Cessna 210R](https://openairdocs.org/model/cessna-210r) (OpenAirDocs)
- Aircraft serial: 21064986
- Engine: Cont IO520L
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 654651A5
- Condition: Worn
- Location: Engine
- Part time: 949 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/99ZZZX2722

## Discrepancy

DURING A ROUTINE 50-HOUR OIL CHANGE COMPRESSION CHECK, EXCESSIVE LEAKAGE WAS FOUND LEAKING PAST THE INTAKE AND EXHAUST VALVE ON THE NR 1 CYLINDER. THE CYLINDER WAS REMOVED AND FOUND TO HAVE A WORN OUT EXHAUST VALVE AND GUIDE.  IT ALSO HAD A BROKEN OUTER SPRING ON THE INTAKE VALVE AND NO CHOKE LEFT IN THE CYLINDER.  POSSIBLE CAUSE; DEFECTIVE PARTS AND ASSY PROCECURES USED DURING REMANUFACTURING PROCESS.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.