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Dash 8 Q400 3 KL > Hydraulic Power > Flashcards

Hydraulic Power Flashcards

1
Q

Standby Hydraulic Pump power source

A

normal - right 115 volt variable AC bus

backup - left 115 volt variable AC bus

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2
Q

Backup pressure source to hydraulic system 1

A

AC electrically driven Standby Hydraulic Pump

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3
Q

Backup pressure source for hydraulic system #2

A

Power Transfer Unit powered by hyd system #1

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4
Q

3 hydraulic system purpose

A

provides hydraulic pressure to the left and right inboard elevator PCUs when necessary

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5
Q

DC Motor Driven Pump maintains accumulator pressure within…

A

2600 psi to 3250 psi.

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6
Q

When does the #3 hydraulic system automatically operate?

A

1 and/or #2 main hydraulic system failure, or failure of both engines

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7
Q

3 hydraulic system power source

A

gas charge accumulator pressurized by a DC Motor Driven Pump (DCMP)

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8
Q

1 hydraulic system provides power to:

A 
Flaps
Anti-skid/Main Wheel Brakes
Inboard Roll Spoilers
Rudder (Lower PCU)
Elevators (Outboard PCUs)
PTU
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9
Q

2 hydraulic system provides power to:

A 
Landing Gear
Outboard Roll Spoilers
Nose Wheel Steering
Emergency/Parking Brake
Rudder (Upper PCU)
Elevators (Center PCUs)
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10
Q

4 hydraulic system provides power for:

A

Alternate Landing Gear Extension system

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11
Q

Minimum hydraulic quantity for dispatch

A

40%

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12
Q

Hydraulic reservoir capacities

A

1 8 quarts
2 12 quarts
3 2.6 quarts
4 1.2 quarts

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13
Q

Location of #1 hydraulic reservior

A

left engine nacelle

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14
Q

Location of #2 hydraulic reservoir

A

right engine nacelle

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15
Q

Location of #3 hydraulic reservoir

A

environmental compartment (high up, aircraft left)

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16
Q

Location of #4 hydraulic reservoir

A

right side nose compartment

17
Q

When will the Standby Hydraulic Pump automatically activate?

A

no. 1 engine fails or

flaps out of 0 and parking brake released

18
Q

The PTU will produce pressure in the no. 2 hydraulic system if:

A

no. 1 engine driven pump is producing normal pressure and no. 2 hydraulic system has hydraulic fluid

19
Q

When will the PTU operate automatically in the air?

A

no. 1 engine driven pump is producing normal pressure
no. 2 hydraulic system has hydraulic fluid
flaps are selected to more than 0 OR
no. 2 hydraulic system has lost pressure OR
no. 2 engine oil pressure is low

20
Q

When will the PTU operated automatically on the ground?

A

no. 1 engine driven pump is producing normal pressure
no. 2 hydraulic system has hydraulic fluid
parking brake released
flaps are selected to more than 0

21
Q

When will the PTU operate automatically on the ground?

A

no. 1 engine driven pump is producing normal pressure
no. 2 hydraulic system has hydraulic fluid
parking brake released
flaps are selected to more than 0

22
Q

When does the Hydraulic System Isolation valve close?

A

inadequate fluid quantity

23
Q

When the #1 hydraulic system HYD ISO valve closes, hydraulic power is only available to:

A 
Flaps
Rudder
Elevator
PTU
lose - anti-skid/main wheel brakes, inboard elevator
24
Q

When the #2 hydraulic system HYD ISO valve closes, hydraulic power is only available to:

A

Rudder
Elevator
lose - landing gear, outboard roll spoilers, nose wheel steering, emergency/parking brake

25
Q

How are the #1 and #2 hydraulic systems cooled?

A

oil-to-fuel heat exchanger located in the respective fuel tank collector bay

26
Q

When does the #1 hydraulic system priority valve close?

A

1 system hydraulic pressure drops below 2100 psi

27
Q

Closing of the priority valve shuts off hydraulic power to what?

A

Flaps and PTU

maintains - anti-skid/main wheel brakes, inboard roll spoilers, rudder, elevator

28
Q

3 STBY HYD PUMP caution light

A

3 hydraulic system accumulator pressure falls to 900 psi or the DCMP has been running for longer than 60 seconds while on the ground

29
Q

1 or #2 HYD FLUID HOT caution light

A

reservoir temperature is more than 107C

30
Q

1 or #2 HYD ISO VLV caution light

A

isolation valve switch has moved hydro-mechanically to the isolate position

31
Q

1 or #2 ENG HYD PUMP caution light

A

engine driven pump pressure is less than 1,800 psi or the condition lever is set to the fuel cutoff position

32
Q

1 STBY HYD PUMP HOT caution light

A

temperature of the electric motor windings on the no. 1 standby hydraulic pump is too hot

33
Q

Which hydraulic light comes on automatically?

A

PTU CTRL

34
Q

Normal hydraulic pressure

A

3000 psi

Dash 8 Q400 3 KL (16 decks)

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