# SDR 98ZZZX4493

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N954CC](https://openairdocs.org/aircraft/N954CC), registered now
- Make and model: Cessna 182Q
- Registry model: [Cessna 182Q](https://openairdocs.org/model/cessna-182q) (OpenAirDocs)
- Aircraft serial: 18265290
- Engine: Cont O470U
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Lifters
- Part number: 649478
- Condition: Pitted
- Location: Engine
- Part time: 875 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/98ZZZX4493

## Discrepancy

DURING A ROUTINE COMPRESSION CHECK, THE NR 2 CYLINDER EXHAUST VALVE WAS FOUND LEAKING.  AFTER THE CYLINDER WAS REMOVED, ALL CAM LIFTERS FOUND PITTED AND THE NR 5 CYLINDER INTAKE CAM LOBE FOUND SCOURED.  THE ENGINE REMOVED FROM SERVICE.  SUBMITTER SUGGESTED POSSIBLE CAUSE AS DEFECTIVE PARTS AND/OR ASSEMBLY PROCESS FROM THE FACTORY.

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