Type: 321-211 | Engines: 2 × CFMI CFM56-5B3/3 | Serial №: 5779 | First flight: Sep 21, 2013 | S7 Airlines is a biggest Russia's airline headquartered in Ob, Novosibirsk Oblast, with offices in Moscow. Its main bases at Domodedovo International Airport and Tolmachevo Airport. S7 Airlines started in 1957 as "the Tolmachevo united squadron", In 1992 a state-run Siberia Airlines and it privatized in 1994. In the same year, IATA assigned the code S7 to Siberia, which later became the airline's brand.