I just got an Airborne and would like to help - not sure where to start either...best to take this post to the Pinball Magic and Airborne clubs for awareness....are you sure ALL coils are locked - it would seem that - and I haven't looked at the schems - if there is a common denominator between all of them - not sure there is - that would be the culprit....the power supply board and switch board are common culprits....
Matt