Anyone help with this tech query ?
Say A320 is parked on a slope, park brake ON, engines on, all systems normal (simulated world
) , then you lose the brake accumulator function due to say the bag inside the accumulator losing its nitrogen, after that you lose the yellow hydraulics system pressure. What happens next with regard to the brakes and indications ?
Could it be:
a) Accumulator pressure shows zero, brake pressure shows as brakes on due to yellow return line being isolated thus trapping some yellow pressure in the system then once park brake released, brake pressure goes to zero and unable to re-apply park or manual brakes.
or
b) Accumulator pressure shows zero, brake pressure shows zero, brakes are off with park brake handle in ON position and aircraft rolls away.
or
c) Something else entirely ??
Ta for your thoughts.