Hydraulics

Question 1

What hydraulic fluid do we NEVER use?

Answer 1

Skydraul.

Question 2

Whats the PSI of the hydraulic system?

Answer 2

3,000 PSI.

Question 3

What drives hydraulic pumps A and B?

Answer 3

Electric AC power.

Question 4

What happens to the hydraulic pumps in an engine failure?

Answer 4

They will auto seek a good power source.

System A will switch from AC BUS 1 to AC BUS 2.
System B will switch from AC BUS 2 to AC BUS 1.

Question 5

Hydraulic System A consumers?

Answer 5

A-alternate brakes
O-outboard ground spoilers
L-landing gear (normal)

Question 6

Hydraulic System B consumers?

Answer 6

B-brakes (main)
E-emergency landing gear extension
E-e-brake
R-roll spoilers
F-flaps
I-inboard ground spoilers
N-NWS

Question 7

Double engine failure, how do we get gear down?

Answer 7

HYD PWR turn STBY pump from AUTO to CONTINUOS and use ALT GEAR EXTENSION.

Question 8

What does moving the gear handle actually do?

Answer 8

Sends your request for up or down to a PSEU (proxy sensor electronic unit).

Question 9

What does the PSEU need to give you a gear down indication?

Answer 9

It senses two proxy sensors.

Question 10

What hydraulic fluid do we use?

Answer 10

5606