What happened
On the evening of the accident, an aircraft departed Prague, Czech Republic, at 20:08 hrs for a ferry flight to Karlskrona, Sweden. The flight was conducted under Instrument Flight Rules (IFR) with the co-pilot acting as the pilot flying. The flight was performed manually without the use of any autopilot systems. Following a right-hand turn, the aircraft climbed toward the north.
During the climb, the crew engaged in a personal conversation regarding night flying and aircraft maneuvers. While the crew was communicating with Prague and Munich air traffic control regarding altitude changes, the aircraft experienced a series of oscillations. Between 20:17:10 and 20:17:20, the plane rolled left to a 30-degree bank angle and then right to 20 degrees before returning to level flight.
After leveling off at FL270 at 20:19:00, the aircraft's nose pitched up to approximately 14 degrees. Shortly thereafter, at 20:19:09, the aircraft began a rapid roll to the right. Within eight seconds, the aircraft reached an inverted position. During this maneuver, the pitch angle dropped to nearly -85 degrees, resulting in a near-vertical nose dive and a significant increase in airspeed. The aircraft subsequently crashed near Reinhardtsdorf-Schöna, Saxon Switzerland, approximately 500 meters north of the Czech Republic border. There were 0 fatalities and 0 injuries reported among the crew, as the aircraft was unoccupied by passengers.
Findings
Data from the Flight Data Recorder and Cockpit Voice Recorder indicate that the uncontrolled roll into inverted flight was the critical event preceding the impact. The flight was being conducted manually without autopilot assistance.