Bombardier Aerospace recently delivered the 400th Challenger 300 during a ceremony at the aircraft manufacturer’s facilities in Montreal. The milestone super-midsize jet will be operated by Russian business aviation firm BJet, which also has a Global 5000 and 6000, Challenger 605 and 850 and Learjet 60 in its fleet. The first Challenger 300 was delivered to Bombardier Flexjet in early 2004.