jcasey21

Thank you everyone for your help

Also we did not see any difference when engines were running we only see it with the ground test valve tied

We have figured out that the elevator is bypassing, but is there any tech data that supports the pressure drop so if flight crew complains about it again.

running the Aux Pump with ground test valve tied we get a presure of 2600-2800 psi. The second we take the elevator off the stops it jumps up to 3100 psi. We have already changed the Aux pump. Were could our problem be located at