Hydraulics

Question 1

What systems are powered by the #1 HYD system?

Answer 1

• centre AP- nose and body gear actuation and steering- left elevators- inboard TE flaps- some ailerons- alternate brakes- upper rudder (with #3)

Question 2

What systems are powered by the #4 HYD system?

Answer 2

• wing gear actuation- right elevators- outboard TE flaps- some spoilers- some ailerons- lower rudder (with #2)- normal brakes

Question 3

What systems do HYD #2 and #3 share?

Answer 3

stabilizer trim and yaw dampers

Question 4

With the loss of HYD #4, do you have auto brakes and anti-skid?

Answer 4

auto brakes- noanti-skid- yes, in pairs only

Question 5

What powers the #1 and #4 demand pumps?

Answer 5

Air (it’s faster)

Question 6

What powers the #2 and #3 demand pumps?

Answer 6

electric (more torque)

Question 7

Is there a shut off valve for the demand pump?

Answer 7

No, theres a switch but not a valve

Question 8

When do demand pumps 1 and 4 automatically operate?

Answer 8

flaps in transit or out of up

Question 9

What conditions will cause the HYD SYS fault light to illuminate?

Answer 9

NAME?

Question 10

What conditions will cause the demand pump low PRESS light to illuminate?

Answer 10

NAME?

Question 11

When the demand pump switch is in AUX, why doesn’t the PRESS light extinguish?

Answer 11

because the pressure light is for the demand pump and it isn’t on

Question 12

When do the aux hyd pumps stop operating automatically?

Answer 12

When the EDP’s pressurise the system?

Question 13

At what hyd value does the hud sus give an RF and Lo indication?

Answer 13

.75 and .35

Question 14

Can you see all the systems powered on the hyd system synoptic?

Answer 14

Yes

Question 15

When flaps are out of up which pumps come on?

Answer 15

1/4 demand pumps operate.

Question 16

With a HYD CONTROL 1 caution what may be affected with the demand pump? What must you do according to the checklist?

Answer 16

Automatic switching to turn on the demand pump and system indications may be failed.Turn on the demand pump

Question 17

If the HYQUIM fails what strange things might you see?

Answer 17

Sys fault lights flask on and off Hyd qty low messages appear/disappear Hyd qty increases and decreases

Question 18

What is required for the HYD SYS FAULT light to come on?

Answer 18

PRESS lights on both EDP and Demand