The Bombardier Challenger 600 series is a family of business jets designed by Bill Lear and produced first by Canadair until that company was bought by Bombardier Aerospace in 1986.
• CL-601-1A - refined version including winglets to reduce drag and more powerful General Electric engines. (66 built, including 4 CL-144s)
o CL-601-1A/ER - 601-1A retrofitted with the 601-3R's additional fuel tank
• CL-601-3A - further uprated engine and a glass cockpit. This was the first version marketed by Bombardier.
o CL-601-3A/ER - 601-3A retrofitted with the 601-3R's additional fuel tank
• CL-601-3R - extended range version with an extra fuel tank added to the aircraft's tail