Hydraulics Flashcards

1
Q

Where are the hydraulic system fluid reservoirs located?

A

Main gear wheel well area

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2
Q

What pressurizes the A/B hydraulic reservoirs?

A

Bleed air pressure

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3
Q

What pressurizes the standby hydraulic reservoir?

A

System B reservoir pressure

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4
Q

When does the white RF (refill) appear on the hydraulic system page?

A

Hydraulic quantity is below 76%, and

Aircraft is on the ground with both engines shutdown, or

After landing with flaps up during taxi-in

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5
Q

What does the ELEC 2 pump ON/OFF switch control?

A

The electric motor-driven pump for hydraulic system A

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6
Q

What happens when an ENG hydraulic pump switch is turned off?

A

A blocking valve is closed which isolates fluid flow from the system components and the pump

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7
Q

What is normal hydraulic system pressure? maximum pressure?

A

Normal pressure 3,000 PSI +/- 200 PSI, maximum system pressure is 3,500 PSI

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8
Q

What does the OVERHEAT (amber) light on the hydraulic panel indicate?

A

An overheat in the respective pump

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9
Q

What is the purpose of the power transfer unit (PTU)?

A

Hydraulic system A power is used to power system B for autoslats and leading edge devices.

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10
Q

Does system A or B pressure loss alone cause operation of the standby hydraulic system?

A

No.

Force fight monitor, OR

Loss of A or B AND FLT CTRL SW ON,

AND

Flaps Extended

AND

Airborne OR > 60kts

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11
Q

What could cause automatic operation of the standby hydraulic system?

A

PCU Force Fight Monitor (FFM), or

Loss of system A or B, and

Respective FLT CONTROL switch ON, and

Flaps extended, and

Airborne or wheel speed > 60 kts

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12
Q

What switches activate the standby hydraulic system for operation of the rudder and thrust reversers?

A

Standby Hydraulic Flight Control switches A and B to STBY RUD.

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13
Q

What does the STANDBY HYD LOW QUANTITY (amber) light indicate?

A

Standby hydraulic reservoir quantity is less than 50%.

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14
Q

Is standby hydraulic quantity and pressure lights always monitored?

A

Quantity is always monitored

Pressure is monitored when the system is being used

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15
Q

How is standby yaw damper activated?

A

Both standby hydraulic flight control switches to STBY RUD

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