HYDRAULIC Panel

Question 1

Can the aircraft be flown with a loss of all hydraulic systems?

Answer 1

No – you must have at least one

Question 2

What occurs when you press the RAT MAN ON pb?

Answer 2

o The RAT extends providing pressure to the BLUE hydraulic system.

Question 3

Does the PTU transfer hydraulic fluid?

Answer 3

No

Question 4

How many hydraulic pumps are in the GREEN system?

Answer 4

ow many hydraulic pumps are in the GREEN system?
o 1 Engine
o 1 PTU

Question 5

How many hydraulic pumps are in the BLUE system?

Answer 5

o 1 Electric

o 1 RAT

Question 6

How many hydraulic pumps are in the YELLOW system?

Answer 6

o 1 Engine
o 1 Electric
o 1 PTU
o 1 Hand pump

Question 7

When does the BLUE ELEC PUMP operate?

Answer 7

o After the first engine is started.
o If the BLUE PUMP OVRD pb on the MAINTENANCE panel has been
pressed with no engine running

Question 8

What is normal system hydraulic pressure?

Answer 8

3000 PSI

Question 9

Does the RAT automatically deploy with the loss of BLUE pressure?

Answer 9

o No, it must be deployed manually by the RAT MAN ON pb.

Question 10

If the ACCU PRESS indicator is low, what should you do?

Answer 10

Obtain ground clearance, then turn ON the YELLOW ELEC PUMP to
pressurize the accumulator.

Question 11

When does the PTU operate with pb in AUTO?

Answer 11

o With a difference of 500 PSI between GREEN and YELLOW pressure.
o Self test between first and second engine start

Question 12

When is the PTU inhibited?

Answer 12

o PTU pb OFF
o First Engine start
o Parking brake is ON and only one ENG MASTER switch is ON
o NWS in towing position and parking brake ON
o Cargo door operation

Question 13

What does a FAULT indication in the PTU pb mean?

Answer 13

o Green or Yellow system:
 Reservoir Fluid Low Level
 Reservoir Overheat
 Reservoir Low Air Pressure

Question 14

If the ECAM actions lead you to turn OFF the PTU for a Reservoir Overheat, will the
FAULT light go out

Answer 14

o When the overheat subsides.

Question 15

Can the YELLOW ELEC PUMP run the PTU?

Answer 15

Yes, which will then pressurize the Green hydraulic system.

Question 16

Name some items that run from the GREEN system on the A-320.

Answer 16

o Landing gear
o NWS
o Normal Brakes
o Slats and flaps
o #1 Thrust reverser

Question 17

Name some items that run from only the YELLOW system on the A-320.

Answer 17

Alternate Brakes
o Parking Brake
o Cargo doors
o #2 Thrust reverser

Question 18

What does an amber FAULT light in the ENG PUMP pb indicate (POLL)?

Answer 18

o P - Pump pressure low
o O – Over-temp in reservoir
o L – Low air pressure in the reservoir
o L - Low quantity in the reservoir

Question 19

What does a FAULT light in the BLUE or YELLOW ELEC PUMP pb indicate (POLLO)?

Answer 19

o P - Pump pressure low
o O – Over-temp in reservoir
o L - Low air pressure in the reservoir
o L - Low quantity in the reservoir
o O - Overheat of Pump

Question 20

What is the purpose of the hand pump?

Answer 20

o To provide Yellow hydraulic pressure for cargo door operation.