Bombardier Q400 turboprop airplane. Q400 (The Q stands for “quiet.”) Bombardier Q400 Built in Toronto. Bombardier Q400 aircraft is the first turboprop aircraft in the world that has 90-seat capacity. bombarider q series formerly known bombardier dash 8 aircrafts. The Bombardier Q Series - originally called Dash 8 - is a series of turboprop-engine commercial airplane. Many major airlines uses this bombardier q-400 aircrafts for regional operations.