Citation I first flew on 15 September 1969, powered by two Pratt & Whitney Canada JT15D turbofans. Produced between 1969 and 1985 for a total of 689 examples, it is the first of the Cessna Citation family. 1970s first flight The trijet Dassault Falcon 50 made its first flight on 7 November 1976. The MTOW airplane is powered by three TFE731 engines. With the cross-section of the Falcon 20, it is the basis of the larger Falcon 900. On 8 November 1978, the prototype Canadair Challenger took off. The MTOW craft, usually powered by two General Electric CF34s, formed the basis of the long range Bombardier Global Express family and of the Bombardier CRJ regional airliners. The 1000th Challenger entered service in 2015. On 30 May 1979 the all-new MTOW Cessna Citation III took off for the first time, powered by two TFE731s. The Mitsubishi MU-300 Diamond made its first flight on 29 August 1978. The MTOW jet was powered by two JT15D. The design was later sold and was renamed Beechjet 400 then Hawker 400, with a total of 950 produced of all variants. 1980s first flight The 1980s only saw the introduction of derivatives and no major new designs. Also there was an advent of fractional ownership in the late 1980s for business jets. For much of the 1980s, sales of new aircraft slumped. 1990s first flight On 29 April 1991, the Cessna CitationJet was first flown. Powered by two Williams FJ44 engines, the light jet used a modified Citation II fuselage with a new wing and tail, and was subsequently developed into the CJ series and M2, ultimately replacing the Citation I, Citation II and Citation V series. The 2,000th CitationJet was delivered in 2017. The first flight of the all-new Learjet 45 was on 7 October 1995. All of the 642 aircraft built since then have been powered by two TFE731 engines. Powered by two Williams FJ44s, the Beechcraft Premier I light jet made its first flight on 22 December 1998. Nearly 300 had been made before production stopped in 2013. 2000s first flight In the opposite way compared to Bombardier, which developed airliners from a business jet, Embraer derived the Legacy 600 from the Embraer ERJ family of regional jet airliners. Powered by two Rolls-Royce AE 3007s, the first flight of the aircraft was on 31 March 2001. On 14 August 2001, the Bombardier Challenger