Hydraulics

Question 1

How many hydraulic systems do we have?

Answer 1

3

Green, Blue, and Yellow

Question 2

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

Answer 2

No, must have at least one

Question 3

What occurs when you press the RAT MAN ON pb?

Answer 3

The RAT extends providing pressure to the BLUE hydraulic system

Question 4

Does the PTU transfer fluid?

Answer 4

No, must have fluid in both systems to operate though

Question 5

How many hydraulic pumps in the GREEN system?

Answer 5

2

• 1 engine pump
• 1 PTU

Question 6

How many hydraulic pumps are in the BLUE system?

Answer 6

2

• 1 Electric
• 1 RAT

Question 7

How many hydraulic pumps are in the YELLOW system?

Answer 7

4

• 1 engine
• 1 electric
• 1 PTU
• 1 hand pump

Question 8

When does the BLUE electric pump operate?

Answer 8

• after the first engine is started

- if the BLUE PUMP OVRD pb on the MX panel has been pressed with no engine running

Question 9

What is normal system pressure?

Answer 9

3000 psi

Question 10

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

Answer 10

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

Question 11

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

Answer 11

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

Question 12

When does the PTU operate with pb in AUTO?

Answer 12

• with a difference of 500 psi between GREEN and YELLOW pressure
• self test between first and second engine start

Question 13

When is the PTU inhibited?

Answer 13

• PTU pb OFF
• First engine start
• parking brake is ON and only one ENG MASTER switch is ON
• NWS in towing position and parking brake ON
• cargo door operation

Question 14

What does a FAULT indication in the PTU pb mean?

Answer 14

• GREEN or YELLOW system: (LOL)
  
  • reservoir fluid low level
  • reservoir overheat
  • reservoir low air pressure

Question 15

What if the ECAM actions lead you to turn OFF the PTU for a reservoir overheat, will the FAULT light go out?

Answer 15

When the overheat subsides

Question 16

Can the YELLOW ELEC PUMP run the PTU?

Answer 16

Yes, which will then pressurize the GREEN hydraulic system

Question 17

Name some items that run from the GREEN system

Answer 17

• landing gear
• NWS
• normal brakes
• slats and flaps
• # 1 thrust reverser

Question 18

Name some items that run from only the YELLOW system

Answer 18

• alternate brakes
• parking brake
• cargo doors
• # 2 thrust reverser

Question 19

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

Answer 19

POLL

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

Question 20

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

Answer 20

POLLO

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

Question 21

What is the purpose of the hand pump?

Answer 21

To provide YELLOW hydraulic pressure for cargo door operation