I just purchased the MD-11 and I have one question... is there a way to verify in the fmc if 250 knots was enetered when we under fl100...on the boeing 747 all I have to do is go vnav page and modify if I want to.... bt don't know how to do it with md-11

Try the PERF menu. I think there is an entry for the max speed limit.Look at page FMS.30.3-30.8 for more information. That will point you in the right direction. To enter an airspeed constrait for a waypoint, enter it at the desired waypoint by typing "XXX (airspeed in numbers)/". That should do it.Actually, I think that the FMS automatically selects 250 knots below 10,000 feet. If the Vcl speed (Takeoff page) is higher than 250 knots, it will automatically select the higher speed.

Thx for your quick reply