If a jump-capable Mech is damaged and you have a Repair Bay captured, select the Mech to jump to any location. While
in the air, select the Mech to repair in the Repair Bay. The Mech will land, then start walking to the Repair Bay. Do not order the Mech at this time. While walking, the Mech should be repairing. Note: If the Repair Bay is in a base, you must have the Gate Control under your command or the Mech pilot will tell you he or she cannot get there.
Capture a resource building and place 2 minelayers and 1 repair truck beside. then wait for the voice that will say "new technology acquired". then look at the mechs who has jumpjets, you will see a new option for flying. enjoy your flight!!! just do it!!!