Flight Plan and Preparation
On 9 April 2016, the pilot-in-command of a Robinson R-66 helicopter (registration RA-1981G) planned flights along the route: Sidorenki (Serpukhov District, Moscow Region) – Heliport Moscow – Bunkovo – Sidorenki. According to the Moscow Air Traffic Control Center (MCC ATC), the first two flights were conducted in airspace classes G and C, while the third flight was in class G. The pilot submitted an airspace usage request via the MCC ATC website and received approval.
A preflight inspection was performed in accordance with the R-66 rotorcraft flight manual. Fuel load was approximately 210 liters. Takeoff weight was about 860 kg, and the center of gravity was 100.8 inches. Both values were within the manual's limits: maximum weight 1225 kg, center of gravity range 91–102.5 inches.
The pilot did not undergo a medical examination before the flight, as per section 8.10.1 of Federal Aviation Rules 128, which allows the pilot-in-command to decide crew fitness when no medical personnel are available at the departure point. The pilot did not request a weather forecast for the route, stating that the actual weather was good.
Execution of Flights
Between 06:37 and 10:08, the helicopter performed three flights. The first takeoff occurred at 06:41 from the Sidorenki landing site, located on the bank of the Nara River near the village of Sidorenki. No passengers were on board. After takeoff, the pilot flew north, then from 06:47 followed the Kaluga Highway toward Moscow. At 06:57:41, the helicopter turned over the Moscow Ring Road (MKAD) and continued along it.