What happened
On September 14, 2009, an engine and systems test was scheduled for a Robinson R-44 following its de-preservation. The pilot arrived at the "Lugovskoye" landing pad at 12:20 local time, accompanied by his brother, who sat in the left seat of the cockpit despite the pilot's standard position being on the right. At 12:35, the pilot conducted a pre-flight inspection and engine test. The engine and systems were reported to be functioning according to the R-4SS flight manual, with no issues noted.
At 12:53, the pilot initiated takeoff from the Lugovskoye pad on a heading of 170° without shutting down the engine and while the passenger remained on board. The takeoff weight was 904kg, which was within the maximum allowable limit of 1089kg, and the center of gravity was within limits. The aircraft was carrying 50kg of LL 100 fuel. The flight was conducted without notifying Air Traffic Control or the Perm Approach controller.
An eyewitness observed the helicopter climb and fly normally before performing a right turn to a heading of 320° at a distance of 200-300m from the takeoff site. After traveling an additional 600-700m, the aircraft performed a left turn, descending to an altitude of approximately 15-20m on a heading of 170°. Following another 600m of flight, the helicopter entered a left turn with a descent and a bank of approximately 20°. During this maneuver, the witness heard characteristic blade slapping sounds. The aircraft subsequently disappeared behind trees, the engine noise ceased, and a column of smoke was observed roughly 30 seconds later.
The investigation
Investigators reviewed the testimony of the aviation engineer responsible for the pre-flight preparations. The investigation noted that the takeoff was performed without coordination with Air Traffic Control services or notification to the Perm Approach controller. The inspection of the crash site was initiated following the sighting of smoke.