Challenger 601-1A: Featured General Electric (GE) CF34-3A engines with 40.7 kN (4,145 kgp / 9,140 lbf) thrust each. Initial flight was on 10 April 1982, with 66 built into 1987."
"Challenger 601-3A: Featured GE CF34-3A engines that could operate at higher temperatures, and Honeywell digital avionics. Initial flight was on 28 September 1986, with 134 built into 1993."
"Challenger 601-3R: Same as 601-3A, but with fuel tank in extended tail; 59 were built into 1996.


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