Originally Posted by
scambo1
----
Is that the electric hydraulic pump I hear in the cabin of the 320, I thought it was the PTU. It is loud to the point of actually deserving a PA (seriously).
There is a PTU (also loud) back there too! But that is a motor/pump, just transfers press not fluild to the low press system. You hear that right at the wing in the cabin. Like I said, it's been a few years and airplanes ago.