2014, a MSA demonstrator which is a modified CL-604 made its first flight, but the final aircraft will use the CL-605 airframe. The demonstrator currently has the external shapes for the sensors and communications systems which will be added later. The final MSA is expected to cost $55 million to $60 million per aircraft. The 605 and 650 improve the avionics and cabin, but their performance figures are similar to the 604. CL-650 CL-650 Following a first flight in 2015, the Challenger 650 was certified and introduced in 2015. Compared to the Challenger 605, it has a redesigned interior cabin, Rockwell Collins Pro Line 21 Advanced avionics (similar to the Challenger 350), and a 5% increase in takeoff thrust. In 2021, its equipped price was $32.4M. Operators The 500th unit was rolled out in May 2000. The 1000th, a 650, was delivered to NetJets in December 2015. Including the Challenger 300 and Challenger 850, the 1,600 Bombardier Challengers in-service had logged 7.3 million hours and over 4.3 million flights by early 2017. As of December 2017, close to 1,100 Challenger 600 Series have been delivered. By October 2018, the global Challenger fleet amounted to 997: of these, 611 were based in North America, 151 in Europe, 93 in Latin America, 78 in Asia-Pacific, 37 in Africa and 23 in Middle East. Military and government operators Civilian operators Incidents and accidents By May 2019, the Challenger fleet suffered 17 hull loss accidents causing 39 fatalities. Specifications (Challenger 650) See also References External links Challenger 600 1970s Canadian business aircraft CL-600 T-tail aircraft Aircraft first flown in 1978 Twinjets Low-wing aircraft