The only problem I've come accross is speed management... First tutorial flight I took off and forgot to watch my speed (used to an airbus with autothrottle... and op climb :() I passed 250 KIAS and the plane blew in pieces... Now I'm flying from LSMP to LKKV and at a moment the weather changed (REX weather engine) and my plane suddenly went from 220 kias to 260, I just had time to pause and untick the destroy aircraft when too much constraints... I think I'll leave this option off as it can be frustrating when you're flight ends because the weather changed the speed.Two question, does this happen to you as well ? At what speed do you cruise at at FL210 ? I'm currently at M .406... Weight about 22000 lbsEDIT : Now increased my speed to .50 M

Jerry,Make sure you selected LNAV on the EHSI display controller. If you don't do that, NAV mode won't follow the FMS path.

Thanks Mike. That may be what I was doing wrong. I'll give it a try tonight.