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Limitations > Hydraulics > Flashcards

Hydraulics Flashcards

1
Q

How many hydraulic pumps are installed?

A

6

2 engine driven pumps
2 direct current motor pumps. DCMP
ONE AUXILIARY PUMP
one PTU

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2
Q

At what pressure does the hydraulic system normally operate?

A

3000 PSI

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3
Q

What is a PTU?

A

Power transfer unit

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4
Q

During what conditions does the PTU operate?

A

Left hydraulic pump failure
Airborne
Gear disagree

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5
Q

From where does the PTU obtain pressure?

A

The right side hydraulic system

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6
Q

What does the PTU power?

A

Gear and hydraulic motor driven generator (HMDG)

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7
Q

How much fluid do the left and right reservoirs contain?

A

Left 13 quarts

Right 9 quarts

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8
Q

Why is there more fluid in the left reservoir than in the right?

A

Need more fluid to work landing gear system

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9
Q

What primary flight controls our hydraulically powered?

A

All of them except the ailerons

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10
Q

What type of hydraulic fluid is used in the challenger 350 aircraft?

A

Phosphate Ester fire resistant
Skydrol LD4
Hyjet 4 A plus

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11
Q

From where do the left and right DCMP’s obtain power?

A

Right DCMP. - left ESS BUS

LEFT DCMP- right main bus station

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12
Q

Are normal brakes still operational in the event of a left and right hydraulic failure?

A

Yes because of the accumulators

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13
Q

What is the purpose of the AUX hydraulic pump?

A

In case of right hydraulic failure allows control of Rudder with lower rudder PCU

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14
Q

Are all the multifunctional Spoilers operative after a right hydraulic system failure?

A

No

Outboard flight spoilers are no longer operative

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15
Q

What is the main purpose of the PTU ?

A

To retract the gear in the event of a left engine driven pump failure

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16
Q

What causes the auxiliary hydraulics system to power the lower Rudder PCU?

A

Failure of the right hydraulic system

17
Q

What powers the lower Rudder PCU during a right system failure?

A

The AUX hydraulic system

18
Q

Which systems are powered by the left hydraulic system?

A 
Landing Gear 
Inboard flight spoilers 
Inboard ground spoilers
Upper rudder PCU
Left Thrust Reverser 
Inboard emergency brakes 
Nosewheel steering actuator 
Inboard elevator PCUs 
Alternate flaps
19
Q

Which systems are powered by the right hydraulic system?

A 
Flaps
Outboard multifunction spoilers 
Outboard ground spoilers
Lower rudder PCU
Right Thrust Reverser 
Outboard brakes 
Main landing gear assist actuators 
Outboard elevator PCUs 
PTU
20
Q

Which systems are powered by the auxiliary hydraulics system?

A

Lower Rudder PCU

21
Q

Where is the hydraulic EDP located?

A

On the engine accessory gearbox

22
Q

Which electrical source powers the left DCMP?

A

Right generator

23
Q

Which electrical source powers the right DCMP?

A

Left generator

24
Q

What memory item apply for a red HYD PRESS LOW CAS message?

A

None

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