Accident
A crew of four—two pilots, one radio operator, and one instructor—was conducting a local training sortie at Hradec Králové Airport. While cruising at an altitude of approximately 200 meters, the left engine failed. The crew decided to return for an emergency landing. During the final turn to the right, the aircraft stalled and crashed in a field in Rusek, located east of the airfield. The radio operator sustained serious injuries, while the other three occupants were killed.
Cause
The official investigation determined the probable cause of the accident to be failure of the left engine caused by a malfunction of the spark plugs.