# SDR 20010606CW002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2001
- Submitted: June 6, 2001
- Operation: General aviation
- Aircraft: [N9746B](https://openairdocs.org/aircraft/N9746B), registered now
- Make and model: Cessna 172RG
- Registry model: [Cessna 172RG](https://openairdocs.org/model/cessna-172rg) (OpenAirDocs)
- Aircraft serial: 172RG1009
- Engine: Lyc O360*
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Piston Ring
- Part number: AL75089
- Condition: Broken
- Location: Nr 3 Cylinder
- Part time: 1,110 hours
- 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/20010606CW002

## Discrepancy

AIRCRAFT WAS CONSUMING A LARGE QUANTITY OF OIL.  UPON INSPECTION FOUND THE NR 3 CYLINDER OIL CONTROL RING LAND ELONGATED DUE TO A SMALL PIECE OF RING WHICH HAD BROKEN OFF AND BEGAN TO FLUTTER.  PROBABLE CAUSE OF SHOCK COOLING.

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