Complex sentence: The first production aircraft was completed on 28 April 1978, with the first scheduled passenger flight, on the Aeroflot Moscow-Krasnodar route taking place on 22 December 1980.
Split into simpler sentences: The first production aircraft was completed on 28 April 1978. With the first scheduled passenger flight, on the Aeroflot Moscow-Krasnodar route taking place on 22 December 1980.