Originally Posted by
Banana Joe
A 737 with FMC U10.8A and in one year on the line I have risked overspeeding already a couple of times with VNAV SPD during descent.
As for VNAV ALT, that is not installed on our fleet.
Do you have the cruise descent function? On ours if you descend more than 50NM early it'll reset the cruise alt and descent at cruise Mach instead of descent schedule. It can be a gotcha as the IAS creeps up with nothing to stop it.