Incident
The crew of two pilots and two engineers were conducting a local test flight following engine maintenance and modification. Shortly after takeoff from Malmen Air Force Base (AFB), while climbing, engine number one caught fire.
Crew and Outcome
Both engineers were able to bail out of the aircraft and were found alive. The two pilots were killed when the aircraft subsequently crashed in a huge explosion in Slaka Kyrka, approximately 4 kilometers south of the airbase.
Probable Cause
Official findings determined the probable cause to be loss of control during initial climb following a fire on engine number one.