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

The RAT extends providing pressure to the BLUE hydraulic system

Question 3

Does the PTU transfer hydraulic fluid?

Answer 3

No

Question 4

What are the sources of pressure in the GREEN system?

Answer 4

• Engine 1 hydraulic pump

* 1 PTU

Question 5

How many hydraulic pumps are in the BLUE system?

Answer 5

• 1 Electric

* 1 RAT

Question 6

How many hydraulic pumps are in the YELLOW system?

Answer 6

• Engine 2 hydraulic pump
• 1 Electric
• 1 PTU
• 1 Hand pump

Question 7

When does the BLUE ELEC PUMP operate?

Answer 7

• After the first engine is started

* If the BLUE PUMP OVRD pb on the MAINTENANCE panel has been pressed with no engine running and AC power applied

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

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

• With a difference of 500 PSI between GREEN and YELLOW pressure
• After first engine start until second engine is started

Question 12

When is the PTU inhibited?

Answer 12

• On the ground if all of the following conditions are met:
• PTU pb OFF
• One ENG MASTER SW ON and the other OFF
• Parking brake is ON and only one ENG MASTER switch is ON
• NWS in towing position or parking brake ON
• PTU is also inhibited during Cargo door operation

Question 13

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

Answer 13

No, not until the overheat subsides

Question 14

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

Answer 14

Yes – also a FAULT light illuminated in the respective ENG PUMP pb

Question 15

Can the YELLOW ELEC PUMP run the PTU?

Answer 15

Yes, which will then pressurize the Green hydraulic system

Question 16

Does operating the cargo door run the PTU?

Answer 16

No, it is inhibited

Question 17

Name several items that run from only the GREEN system?

Answer 17

• Slats and Flaps
• Landing gear
• Normal Brakes
• # 1 Thrust Reverser
• Rudder
• THS

Question 18

Name several items that run from only the YELLOW system?

Answer 18

• Flaps
• Nosewheel Steering
• Alternate Brakes
• Parking Brake
• # 2 Thrust Reverser
• Cargo doors

Question 19

What does an amber FAULT light in the PTU pb indicate (OLL)?

Answer 19

• Overtemp in reservoir
• Low air pressure in the reservoir
• Low quantity in the reservoir

Question 20

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

Answer 20

• Pump pressure low
• Overtemp in reservoir
• Low air pressure in the reservoir
• Low quantity in the reservoir

Question 21

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

Answer 21

• Pump pressure low
• Overtemp in reservoir
• Low air pressure in the reservoir
• Low quantity in the reservoir
• Pump Overheat

Question 22

Where are the HYD FIRE SHUTOFF VALVES located?

Answer 22

Between the reservoirs and the ENG pumps

Question 23

What is the function of the hydraulic priority valves?

Answer 23

Hydraulic power to the flaps, slats, landing gear, NW steering, and emergency generator is cut off if pressure
drops below a predetermined value

Question 24

What is the purpose of the hand pump?

Answer 24

To provide Yellow hydraulic pressure for cargo door operation

Question 25

If AC power is available, the blue electric pump operates when?

Answer 25

• In flight
• On the ground, if one engine is running or if the crew has pressed the BLUE PUMP OVRD pushbutton on the maintenance panel.