# SDR YAAA201306200001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2013
- Submitted: June 20, 2013
- Operation: Air carrier
- Aircraft: [N1704U](https://openairdocs.org/aircraft/N1704U), registered now
- Make and model: Cessna 207
- Registry model: [Cessna 207](https://openairdocs.org/model/cessna-207) (OpenAirDocs)
- Aircraft serial: 20700304
- Aircraft time: 31,641 hours
- Engine: Cont IO520D
- Engine time: 3,086 hours
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Piston
- Part number: AEC648045Z
- Condition: Fractured
- Location: Engine
- Part time: 1,330 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: Y, T, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YAAA201306200001

## Discrepancy

NUMBER 1 PISTON WAS FRACTURED AT THE PISTON PIN BORE, RELEASING THE NR 1 ROD AND PISTON PIN ASSY AT THE SMALL END.  THE UNSUPPORTED NR 1 ROD AND PISTON ASSY CAUSED EXTREME MECHANICAL DAMAGE TO THE REAR SECTION OF THE CRANKCASE AND CAMSHAFT.

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