NTSB Identification: IAD02LA063.
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Accident occurred Sunday, June 23, 2002 in Bentleyville, PA
Probable Cause Approval Date: 08/26/2003
Aircraft: Murawski Pulsar, registration: N5123B
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

While en route, the airplane's engine lost power and the pilot performed a forced landing to a hayfield. Examination of the two-stroke Rotax engine revealed that the lower MAG cylinder connecting rod bearing had failed, and portions of it, in the form of metallic debris were observed in the chamber beneath the MAG cylinder. Further disassembly of the engine revealed debris damage on the MAG cylinder piston dome and combustion chamber, as well as the crankcase, the rotary valve and drive shaft gear.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

Failure of the MAG cylinder rod bearing, which resulted in a loss of engine power. A factor in the damage to the airplane was the terrain condition of the forced landing field.

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