Sorry guys but the A/C pumps were on system 1 for braking and system 4 for steering
Wrong way round, 4 for brakes 1 for steering.
I believe the start logic can be fooled by pulling a certain air-ground system circuit breaker
You can trick it to simulate airmode when on the ground by pulling cb's it's a bit more difficult to trick it to groundmode when in the air, it takes a bit more than pulling cb's, we used to do it when on jacks in a hangar.