Hydraulic Flashcards

1
Q

How many hydraulic systems are on the airplane?

A

3 Independent systems

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2
Q

At what pressure does the hydraulic system normally operate?

A

3000 psi

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3
Q

Each hydraulic system has how many pumps?

A
  1. (A) main pump and a backup pump (B).
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4
Q

What pumps are AC driven? (ACMP)

A

System 3 main pump is an AC motor pump and is designated as 3A. All of the backup pumps are ACMP’s and are designated as 1B, 2B and 3B.

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5
Q

With the hydraulic switches in the AUTO position, the 1B and 2B pumps automatically start when?

A

Respective bus is powered, the associated engine-driven generator is operating, and the alps are not at zero (flap position is greater that 4°)

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6
Q

What color is a non-powered component on the hydraulic synoptic page?

A

A non-powered component is amber in color.

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7
Q

What component ensures that hydraulic pressure is supplied to the flight controls if hydraulic system 3 pressure becomes too low?

A

To ensure priority to the primary flight controls a priority valve cuts off hydraulic system 3 pressure to the landing gear selector valves if hydraulic system 3 pressure drops too low.

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