Drobný výtah:
During the flight there was a region of particularly cold
air, with ambient temperatures as low as -76ºC, in the
area between the Urals and Eastern Scandinavia. The
Met Office described the temperature conditions during
the flight as ‘unusually low compared to the average,
but not exceptional’. The lowest total air temperature
recorded during the flight was ‑45ºC, and the minimum
recorded fuel temperature was -34ºC. The specified
fuel freezing temperature for Jet A-1 is not above
‑47ºC; analysis of fuel samples taken after the accident
showed the fuel onboard the aircraft complied with the
Jet A-1 specification and had a measured fuel freezing
temperature of -57ºC. The aircraft was operated within
its certified flight envelope throughout the flight.
