Jump? As I remember it, you should come out shortly after you go in in a small tunnel/catwalk area. Just make sure to hold crouch the whole way inside the vent. And I found it easier not to use the Low Light visor, as it can make it slightly harder to see the (dim though it may be) light that show through the exit to the vent. Head down the catwalk to find another vent but it has a door over it. Look to your Right, their should be a clone trooper their or coming, on the other catwalk. He'll talk to you punch a few buttons on the console and open the door. Then go through it to proceed.