Flight Details
On 25 December 2019, the crew of a Mi-8AMT helicopter (registration RA-22720) operated by AO "KrasAvia" on behalf of OOO "Slavneft-Krasnoyarskneftegaz" performed commercial flight EK 9663. The flight was a passenger and baggage transport mission along the route: Baikit – CPS – K-219 – Baikit – K-257 – K-219 – Baikit.
Pre-flight Preparation
The flight crew arrived at the Baikit landing site at approximately 03:00 on 25 December 2019. Under the direction of the captain, they began pre-flight preparation. The captain conducted the pre-flight medical examination by verbally questioning the crew members, a procedure permitted under the relevant regulations (FAP-128).
Weather and Fuel
At 04:36 on 25 December 2019, the crew obtained meteorological information about actual and forecast weather from the Baikit weather group. The weather conditions did not preclude the mission. The helicopter had been refueled on 24 December 2019 after the previous flight, with 1600 liters (1328 kg) of TS-1 fuel added to a total volume of 2600 liters (2158 kg). The fueling was performed per request No. 067680. A fuel quality certificate dated 23 December 2019 (No. 3575) was provided to the investigation commission.
Loading and Weight
The flight task was received from the assistant commander of the KrasAvia aviation group. For the segment to CPS, the helicopter carried 21 passengers and 472 kg of baggage. The takeoff weight was 12018 kg, which did not exceed the maximum allowable takeoff weight of 13000 kg. The center of gravity at takeoff was +20 mm, within the operational range of +300 to -95 mm for the Mi-8AMT.
Engine Start
At 04:55, the captain requested engine start at parking spot 5. After start, engine warm-up began.