# SDR CA040630002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2004
- Submitted: December 3, 2004
- Operation: General aviation
- Make and model: Cessna U206G
- Registry model: [Cessna U206G](https://openairdocs.org/model/cessna-u206g) (OpenAirDocs)
- Aircraft time: 7,686 hours
- Engine: Cont IO520F
- Propeller: Mcauly D3A34C404
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankcase
- Part serial: 1686209F
- Condition: Cracked
- Location: Engine
- 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/CA040630002

## Discrepancy

(CAN) DURING UNSCHEDULED MAINTENANCE 3 CRACKS WERE NOTICED ON CRANKSHAFT NEAR PROP FLANGE. TWO CRACKS WERE APPROXIMATELY 2 INCHES IN LENGTH PARALLEL TO EACH OTHER WITH SMALLER CRACKS EXTENDING. ONE CRACK IS ALSO APPROXIMATELY 2 INCHES IN LENGTH AND ABOUT 1 INCH FROM THE OTHER TWO CRACKS. THESE CRACKS RUN ALONG THE CIRCUMFERANCE OF THE CRANKSHAFT.

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