ray916221

downscc- There is two cases that my FMC freeze sometimes it happened during flight when im trying to step up ALT and increase Speed during flight. Normal its ok to do that but in my case it wont let me do that. Also sometimes when I try to do my Preflight and when I enter the Cost index that's the time it freeze numbers don't show up on FMC screen.

Helloo... Pls help anyone have problem about the FMC freeze after putting the Cost Index..? Also it wont let me change the ALT and Speed during flight even the OPTIMAL ALT is being said. I have a Sample image but don't know how to put it here....