The Yak-40 was the first jet powered airliner in its class in service in large numbers anywhere in the world, preceding the ERJ-135 and 328JET by three decades. Design of the Yak-40 resulted from a mid 1960s Aeroflot requirement for a replacement for the thousands of Lisunov Li-2s (Soviet built DC-3s), Ilyushin Il-12s and Il-14s (described ... More @Wikipedia
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