A330 hyd. pressure fluctuating on gnd w/elec. pumps
Anybody ever come across an elec. hyd. pump pressure fluctuation on ground, with all 3 hyd. systems pressurized, going from 3000 to 1700psi and back to 3000 in a matter of a second or two. In my case it was the blue hydraulic system. Note that no flight controls were being moved at that time, so technically no demands on the hydraulics. It is not the first time I came across this issue with the A330. Just wondering if it's a common issue with the A330, or else maybe I have a pump or hyd. components issues.
Thanks!