Hydraulic

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 pushbutton?

Answer 2

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

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 (+/-200psi)

Question 9

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

Answer 9

No, it must be deployed manually by the RAT MAN ON pushbutton

Question 10

If the ACCU PRESS indicator is low and an external walkaround is to be completed, what should you do?

Answer 10

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

Question 11

What condition will cause the PTU to operate when the pushbutton is in AUTO?

Answer 11

A difference of 500 PSI between GREEN and YELLOW hydraulic systems

Question 12

Can the YELLOW ELEC PUMP run the PTU?

Answer 12

Yes

Question 13

When is the PTU inhibited?

Answer 13

º PTU pushbutton OFF
º First engine start
º Parking brake is SET and only one ENG MASTER switch is ON
º NWS in towing position and parking brake RELEASED
º Cargo door operation (PTU is also inhibited for 40 seconds after the end of cargo door operation)

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

No, not until the overheat subsides

Question 15

If the FAULT light in the PTU pushbutton is ON, are there any other indications on the HYD Panel?

Answer 15

Yes – FAULT light illuminated in the respective ENG PUMP pushbutton

Question 16

Name several items that run from only the GREEN system.

Answer 16

º Landing gear
º Normal brakes
º Slats and flaps
º Engine 1 reverser

Question 17

Name several items that run from only the YELLOW system.

Answer 17

º Nosewheel steering
º Alternate brakes
º Parking brake
º Cargo doors
º Engine 2 reverser

Question 18

List several items that are powered by the BLUE system.

Answer 18

º Slats
º Emergency generator

Question 19

What does an amber FAULT light in the PTU pushbutton indicate?

Answer 19

(OLL)
º O - Overtemp in reservoir
º L - Low air pressure in the reservoir
º L - Low quantity in the reservoir

Question 20

What does an amber FAULT light in the ENG PUMP pushbutton indicate?

Answer 20

(POLL)
º P - Pump pressure low
º O - Overtemp in reservoir
º L - Low air pressure in the reservoir
º L - Low quantity in the reservoir

Question 21

What does a FAULT light in the BLUE or YELLOW ELEC PUMP pushbutton indicate?

Answer 21

(POLLO)
º P - Pump pressure low
º O - Overtemp in reservoir
º L - Low air pressure in the reservoir
º L - Low quantity in the reservoir
º O - Overheat of pump

Question 22

What is the function of the hydraulic priority valves?

Answer 22

Hydraulic power to the flaps, slats, landing gear, and emergency generator is cut off if pressure drops below
a predetermined value (high demand items)

Question 23

What is the purpose of the hand pump?

Answer 23

To provide Yellow hydraulic pressure for cargo door operation