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ERJ Systems > Hydraulics > Flashcards

Hydraulics Flashcards

1
Q

What are the primary hydraulic pumps for systems 1 and 2

A

Engine Driven Pumps (EDP 1&2)

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2
Q

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

A

ON and AUTO

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3
Q

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

A

ACMPs

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4
Q

What should you do before pressing EDP shutoff button?

A

Both pilots confirm it is the correct switch.

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5
Q

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

A

12 o’clock, auto, and dark

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6
Q

What is a PTU?

A

Power Transfer Pump

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

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7
Q

What is the primary hydraulic pump in system 3?

A

3A

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8
Q

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

A

Hydraulics Synoptic page on MFD

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9
Q

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

A

No

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10
Q

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

A

Ground
Flaps more than 0 and speed faster than 50 KTS

Flight
EDP or engine failure or flaps more than 0

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11
Q

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

A

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

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12
Q

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

A

You must turn the AC pump on

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13
Q

What is required to make the PTU turn on?

A

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

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14
Q

When will the PTU automatically start on the ground?

A

I will not automatically turn on when on the ground

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15
Q

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

A

When 3A fails

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16
Q

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

A

HYD 1 pump must be turned ON

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17
Q

Which hydraulic system powers the nose wheel steering?

A

HYD 2

18
Q

How are the thrust reversers actuated?

A

Hydraulically by an electrical control

19
Q

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

A

Emergency / Parking Brake

20
Q

What is primary pump for system 3?

A

ACMP A

21
Q

What is the back up pump for system 3?

A

ACMP B

22
Q

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

A

No

23
Q

Why is there no AUTO mode for pump 3A?

A

ON mode allows there to be no computer between flight

controls and us during and electrical emergency

24
Q

When are the hydraulic AC pumps activated in auto mode?

A

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

25
Q

When will ACMP pump 2 turn on automatically?

A

EDP 1 on and parking brake is released

engine 1 start / singe engine taxi

26
Q

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

A

6 minutes

27
Q

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

A

Turn on ACMP 1

28
Q

When does H-PBIT run?

A

When all three HYD systems are pressurized

29
Q

How long does the H-PBIT take?

A

1 minute

30
Q

How can we interrupt the H-PBIT?

A

Move flight controls

31
Q

When should a hydraulic warm up be performed?

A

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

32
Q

What is the purpose of the PTU?

A

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

33
Q

Does the PTU transfer fluid between system 1 and 2?

A

No

34
Q

What is required for the PTU to work?

A

EDP1 operational and 12% fluid

35
Q

When does the PTU turn on?

A

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

36
Q

Why is hydraulic 2 is important?

A

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

37
Q

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

A

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

38
Q

What hydraulics system is the nose wheel

steering powered by?

A

Hydraulics system 2

39
Q

How can should you disconnect the nose

wheel steering for towing?

A

Disconnect trigger on the back of the yoke

40
Q

How should you engage nose wheel steering?

A

Pushing tiller down

41
Q

What could happen if you shut down engine 2 during

taxi in a turn?

A

Nose wheel steering could be interrupted

ERJ Systems (29 decks)

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