I can never remember ever using FLCH after the FAF on any aircraft type. Maybe I am confused, but I'm pretty sure FLCH is actually a pitch mode either with max climb thrust or idle; elevator controls the speed, yes? Throttles would then control your rate of climb or descent. So, with power at idle, if indeed one was in FLCH, wouldn't you be descending at a good rate to maintain that speed? As I understand it, the Asiana flight was not descending too fast, just too slow. What does this have to do with FLCH?