What causes the AUTO BRAKE system to disarm?
Manually: 1- Applying brakes pedals. 2- Either throttles advanced after landing. 3- Moving speed brake lever to down. 4- Moving the selector to OFF or DISARM. Automatically: 5- Autobrakes fault. 6- Normal anti-skid system fault. 7- Loss of inertial data from ADIRU. 8- Loss of normal brake hydraulic pressure.