Complex sentence: Including the Challenger 300 and Challenger 850,1,600 Bombardier Challengers are in-service, the fleet has logged 7.3 million hours over 4.3 million flights.
Split into simpler sentences: Including the Challenger 300 and Challenger 850,1,600 Bombardier Challengers are in-service. The fleet has logged 7.3 million hours over 4.3 million flights.