What happened
Following a four-month period of inactivity, a multiengine airplane was undergoing preparations for export. After recent avionics upgrades were completed, the pilot initiated a local test flight. Shortly after departing, the pilot radioed an emergency declaration, though the specific nature of the issue was not communicated.
During the flight, the aircraft struggled to maintain altitude and began a right-hand turn back toward the departure airport. The airplane subsequently entered a stall, which led to a 90-degree right roll and a rapid descent. The aircraft struck multiple parked vehicles on the ground and came to rest in an inverted position. A significant post-crash fire occurred, which completely destroyed the airframe and both engines.
Findings
An investigation of the wreckage showed no evidence of mechanical malfunctions occurring prior to the impact. While the left engine showed more significant rotational signatures than the right engine, investigators noted this could have been caused by the sequence of the crash. The left propeller assembly exhibited damage consistent with twisting and rotation, whereas the right propeller assembly remained attached to its gearbox, which had separated from the engine. Due to the absence of flight recorders and the severe damage caused by the fire and impact, no further details regarding the specific cause of the stall could be determined.