Whenever I fly, for some reason, the VNAV disconnects and the FMS says VNAV DISCONNECTED. Then, whenever I try to turn on VNAV again, it just reverts back to FLT CHNG and says VNAV DISCONNECTED. I have the AT set to FMS and FMS as the main navigation, but this is just annoying me. I can't finish a flight. Any help? ThanksKaran

Whenever I fly, for some reason, the VNAV disconnects and the FMS says VNAV DISCONNECTED.

karan:you have flown the aircraft off the FMS determined vertical path. look at the display on the lower half of the MFD.until the aircraft captures the path (your offset is also represented on the PFD) you cannot go back to 'VNAV' and will remain in a reversion mode of VS, PATH, FLC or FPA.you will find discussion on this topic by doing a search of the E-jet V1 support forum -http://forum.iemit.c...x?g=topics&f=13(registration required)--