# SDR CA990226008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 15, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Gulstm 680
- Engine: Lyc GSO480B1A6
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Gear
- Condition: Sheared
- Location: Crankshaft
- Part time: 917 hours
- Stage of operation: CR
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA990226008

## Discrepancy

(CAN) PILOT REPORTED SUDDEN STOPPAGE.  POST-FLIGHT INSPECTION FOUND THE CRANK GEAR MOUNTED ON THE CRANKSHAFT HAD SHEARED AND SPLIT.  IT DID A 180 DEGREE ROTATION AND REPLACED ITSELF, CAUSING THE ENGINE TO BE 180 DEGREES OFF TIMING.

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