# SDR AUS20010938

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2001
- Submitted: September 5, 2001
- Operation: General aviation
- Make and model: Cessna R172K
- Registry model: [Cessna R172K](https://openairdocs.org/model/cessna-r172k) (OpenAirDocs)
- Engine: Cont IO360K
- Propeller: Mcauly 2A34C203
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Piston
- Condition: Damaged
- Location: Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: E, K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AUS20010938

## Discrepancy

(AUS) NR 2 CYLINDER PISTON HOLED IN AREA OF RING GROOVES. EXCESSIVE CRANKCASE PRESSURE VENTED OIL THROUGH THE BREATHER. LOSS OF OIL PRESSURE CAUSED NR 1 CYLINDER CONNECTING ROD BIGEND FAILURE. INVESTIGATION FOUND A PIECE OF BROKEN PISTON RING HAD BEEN WORKING IN THE RING GROOVE CAUSING FAILURE OF THE LAND.

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