Hydraulics

Question 1

What us the normal value of hydraulic pressure with both Engine pumps working?

Answer 1

1500-1575

Question 2

You see a HYD PRESS annunciation appear, whats happened?

Answer 2

Hydraulic pressure in the lines has dropped to 150PSI

Question 3

What is the purpose of bleed air from the mix valve?

Answer 3

Maintain 17psi on the hydraulic revisor.

Question 4

What is the minimum pressure you would check for on the walk around in the accumulators?

Answer 4

750 psi minimum

Question 5

Where are the hydraulic shut off valves located?

Answer 5

Right before the 2 engine driven pumps

Question 6

How many filters are in the hydraulic system?

Answer 6

4 filters total

Question 7

Which hydraulic systems will be offline using the auxiliary pump?

Answer 7

Spoilers and thrust reversers.

Question 8

What are the limitations of the auxiliary hydraulic pump?

Answer 8

3 (cumulative) minutes on

20 minutes off

Question 9

What point will the auxiliary hydraulic pump automatically turn off?

Answer 9

@1125 psi the Auxiliary pump will energize off (with switch on)
Below 1000 psi the Auxiliary pump will turn on (with switch on)

Question 10

With temps

Answer 10

Run engines for 3 min before T/O