On enhanced 320 you have only electrical signal from brake pedals feeding ABCU or BSCU. There is no other way to control normal servo valves or direct drive valves than signal from these computers. Accumulator as pressure source is still available for alternate braking controlled by DDV if ABCU works or for ultimate emergency braking via park brake. You are all correct,but probably not happy with this brake system design...
Last edited by LEVEL600; 22nd Feb 2015 at 15:21.