Hydraulics

Question 1

What are the primary hydraulic pumps for systems 1 and 2

Answer 1

Engine Driven Pumps (EDP 1&2)

Question 2

How should ACMP 1 and 2 be set for takeoff and landing?

Answer 2

ON and AUTO

Question 3

What are the backup hydraulic pumps for hydraulic system 1 and 2

Answer 3

ACMPs

Question 4

What should you do before pressing EDP shutoff button?

Answer 4

Both pilots confirm it is the correct switch.

Question 5

What position should the knobs and switches be in for normal operations?

Answer 5

12 o’clock, auto, and dark

Question 6

What is a PTU?

Answer 6

Power Transfer Pump

Assists the landing gear retraction or extension if EDP 2 or right engine fail.

Question 7

What is the primary hydraulic pump in system 3?

Answer 7

3A

Question 8

Where can you check the hydraulic reservoir temperature, pressure, and quantity?

Answer 8

Hydraulics Synoptic page on MFD

Question 9

Will ACMP 1 automatically turn on during single engine taxi on engine 2?

Answer 9

No

Question 10

If the IDG is set to AUTO when will the ACMP be turned on?

Answer 10

Ground
Flaps more than 0 and speed faster than 50 KTS

Flight
EDP or engine failure or flaps more than 0

Question 11

If you are doing a single engine taxi with engine 1, will HYD system 2 be pressurized?

Answer 11

Yes, the ACP 2 turns on automatically if engine 1 is running and parking brake has been released within 6 minutes

Question 12

If you are doing a single engine taxi on engine 2 how to do you pressurize HYD 1 system?

Answer 12

You must turn the AC pump on

Question 13

What is required to make the PTU turn on?

Answer 13

EDP 2 Failed
EDP 1 Operational
At least 12% fluid in system 2
Flaps greater than 0 or landing gear is not up and locked

Question 14

When will the PTU automatically start on the ground?

Answer 14

I will not automatically turn on when on the ground

Question 15

If hydraulic pump 3B is in the auto position when will the pump operate in flight?

Answer 15

When 3A fails

Question 16

What considerations should be made if you elect to taxi single engine with the right engine?

Answer 16

HYD 1 pump must be turned ON

Question 17

Which hydraulic system powers the nose wheel steering?

Answer 17

HYD 2

Question 18

How are the thrust reversers actuated?

Answer 18

Hydraulically by an electrical control

Question 19

How would you stop after landing with no hydraulics 1 or 2 system?

Answer 19

Emergency / Parking Brake

Question 20

What is primary pump for system 3?

Answer 20

ACMP A

Question 21

What is the back up pump for system 3?

Answer 21

ACMP B

Question 22

Will 3B take over for 3A on the ground?

Answer 22

No

Question 23

Why is there no AUTO mode for pump 3A?

Answer 23

ON mode allows there to be no computer between flight

controls and us during and electrical emergency

Question 24

When are the hydraulic AC pumps activated in auto mode?

Answer 24

Takeoff (50 kts wheel, flaps, TOGA)
Landing (flaps)
Failure of EDP

Question 25

When will ACMP pump 2 turn on automatically?

Answer 25

EDP 1 on and parking brake is released | engine 1 start / singe engine taxi

Question 26

How long will ACMP 2 stay on after the parking brake is release?

Answer 26

6 minutes

Question 27

What do you have to consider if you are planning a single engine taxi on engine 2?

Answer 27

Turn on ACMP 1

Question 28

When does H-PBIT run?

Answer 28

When all three HYD systems are pressurized

Question 29

How long does the H-PBIT take?

Answer 29

1 minute

Question 30

How can we interrupt the H-PBIT?

Answer 30

Move flight controls

Question 31

When should a hydraulic warm up be performed?

Answer 31

First flight of the day when the OAT is less than -18 C

Question 32

What is the purpose of the PTU?

Answer 32

To increase hydraulic flow rate in system 2 if the EDP fails

Question 33

Does the PTU transfer fluid between system 1 and 2?

Answer 33

No

Question 34

What is required for the PTU to work?

Answer 34

EDP1 operational and 12% fluid

Question 35

When does the PTU turn on?

Answer 35

Failure of EDP2 and flaps set greater than 0 or gear not up and locked

Question 36

Why is hydraulic 2 is important?

Answer 36

Hydraulic 2 has the landing gear, brakes, and nose wheel steering

Question 37

What do the red guarded “ENG PUMP SHUTOFF” switches do on the hydraulics panel?

Answer 37

Close SOV and turn off pump (if it doesn’t work we have to shut down engine) Use when directed by the QRH

Question 38

What hydraulics system is the nose wheel | steering powered by?

Answer 38

Hydraulics system 2

Question 39

How can should you disconnect the nose | wheel steering for towing?

Answer 39

Disconnect trigger on the back of the yoke

Question 40

How should you engage nose wheel steering?

Answer 40

Pushing tiller down

Question 41

What could happen if you shut down engine 2 during | taxi in a turn?

Answer 41

Nose wheel steering could be interrupted