I realize most training is accomplished in the sim now, but for years that was not the case. Can anyone remember Canadair (bombardier) training pilots allowing less than full flap landings?
As far as I know, all factory Challenger training was primarily in the sim right from the beginning. I was one of the first U.S. pilots typed in the CL 600, since my company put the first one into U.S. service. We trained in the sim at YUL.
That said, I really can't remember whether there was more than one landing flap setting in the book. It seems like we used less than full flaps in gusty crosswind landings, but we were very standardized, so if we did them as a matter of course it would have been in the book.