Hydraulic System

Question 1

What is on the left hydraulic system?

Answer 1

FLIP
F - Forward A/R Pumps
L - Landing Gear
I - Inboard Spoilers
P - Pilots Brakes

Question 2

What’s on the right hydraulic system?

Answer 2

COL CAN BARF
C - Copilots Brakes
O- Outboard Spoilers
L - Leading edge Flaps
C- Copilot Instrument Power System
A - Aft A/R pumps
N - Nose wheel Steering
B - Boom Controls
A - APU start system
R - Powered Rudder
F - Main Flaps

Question 3

Normal L/R hydraulic pressure

Answer 3

2400-3050psi

Question 4

Normal Reserve Brake Pressure

Answer 4

1300-3050psi

Question 5

Normal hydraulic quantity

Answer 5

4 - 4.5 gallons on each side

Question 6

What should you expect upon landing gear retraction in regards to the hydraulic quantity?

Answer 6

The Left hydraulic system will show a loss of approximately 1 gallon

Question 7

The left system cannot be fully pressurized by the AIC pumps unless what?

Answer 7

Inboard Spoiler switch is set to CUT-OFF

Question 8

The right hydraulic system cannot be fully pressurized by the aux pump unless…

Answer 8

The CIPS is shutoff and the rudder power switch is OFF

Question 9

What is the normal position for the AIC pump switches during flight?

Answer 9

Off because they draw fluid from the main systems return lines

Question 10

When does the aux pump operate when set in the AUTO position?

Answer 10

Turns on between 2400 - 2700 psi

Turns off at 2900 +/- 150psi

Question 11

Reserve brake max pressurization?

Answer 11

3525 +/- 250psi

Question 12

Don’t set the parking brake if the reserve brake pressurization is ____ and above.

Answer 12

3100psi

Question 13

The reserve brake pressurization goes directly to ____

Answer 13

The pilots brakes

Question 14

What components can be crossed over from the right to the left system?

Answer 14

BARF
B - Boom Controls
A - APU start system
R - Rudder power
F - Main Flaps

Question 15

What components can be crossed over from the left to the right system?

Answer 15

Landing Gear

Question 16

What must you do prior to using the crossover valve?

Answer 16

Depressurize the system

Question 17

One brake application is available to the pilots brakes when the reserve brake pressure reads ____

Answer 17

1300 psi

Question 18

Preload pressures at 70*F

Answer 18

Left/ Right System = 2000psi
Reserve Brake = 1000psi

Question 19

If you lose the right system, what should you do upon landing?

Answer 19

Nose wheel steering will be inoperative. The Dash 1 recommends taxiing clear of the runway.

Question 20

When closed what does the depressurization valve do?

Answer 20

Blocks fluid, increases flow circulation, reduced available pressure to 750psi or less

Question 21

When do the hydraulic pump inop lights illuminate?

Answer 21

May come on below 1100 +/- 250psi
Will come on below 700 psi

Question 22

What is the limit for hydraulic pump isolation?

Answer 22

5 mins.

Excess of 5 mins could cause the pump to self destruct.

Question 23

Rudder hydraulic pressure gage normal range.

Answer 23

High PX = 2800 - 3050psi
Low PX = 2100 - 2400 psi

Question 24

Which set of A/R pumps are still available if the left system fails?

Answer 24

Aft A/R pumps

If right system fails, then forward A/R pumps are available