When the pilot notices this on the yellow brake accu pressure indicator it is the correct procedure to let the brakes go, then flip the anti skid and nose wheel steering switch and then use the brakes again to stop the plane. I have also understood that in a case of a failure in the green hydraulic system the normal braking system ceases to work and the yellow hydraulic system takes over. ![]() yellow hydraulic system is supplying the brake system Nose Wheel Steering is deactivated (some airlines require this during pushback) If the switch is "off" the following applies: green hydraulic system is supplying the brake system (except parking brake which is always supplied by yellow system) ![]() If the switch is "on" the following applies: ![]() Hopefully someone can bring me nearer to this mystery.įrom what I have read I understood the following. I'm unfortunately not sure if I understood the full potential of this switch correctly.
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