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Atlas B767 Oral Prep > Hydraulic > Flashcards

Hydraulic Flashcards

1
Q

What are they hydraulic systems on the B767

A
  1. Left, right and center
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2
Q

When does the RAT automatically deploy?

A

Dual engine failure above 80kts

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3
Q

What is the lowest airspeed that the RAT can provide adequate power?

A

130kts

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4
Q

What does the RAT power?

A

Flight control portion of center hydraulic system

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5
Q

How do you know the RAT is producing hydraulic pressure?

A

Green pressure light is illuminated

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6
Q

What is the RAT status with the PRESS and UNLKD lights extinguished?

A

Locked, not providing hydraulic power

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7
Q

When do the engine driven hydraulic pumps produce pressure?

A

When the engines begin to rotate

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8
Q

What type of demand pump powers the center hydraulic system?

A

Air driven pump

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9
Q

What type of demand pumps are on the left and right hydraulic system?

A

Electric driven demand pumps

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10
Q

What does the SYS PRESS light indicate?

A

Low hydraulic system pressure

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11
Q

When would you use the Reserve Brake and Steering Switch?

A

Loss of center hydraulic system

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12
Q

What powers the center hydraulic system?

A

Two electric electric pumps and one air driven pump

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13
Q

What is the normal position of the left and right hydraulic pump switches?

A

On at all times

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14
Q

What happens in the hydraulic system when an engine fire switch is pulled?

A

Closes the engine hydraulic pump shutoff valve and depressurizes the engine pump

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15
Q

What does the hydraulic system QTY light indicate?

A

Less than 50% reservoir quantity

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16
Q

“OVHT” light above the left electric pump switch indicates what?

A

Left electric pump is overheated

17
Q

Which pumps are operating when the engine primary pumps are not operating?

A

Left and Right electric demand pumps

18
Q

With the selector switch in AUTO, when will the left and right electric demand pumps operate?

A

When engine pump pressure is low and times of high demand

19
Q

Which hydraulic system pump powers the reserve brake and steering system?

A

C1 pump

20
Q

What does hydraulic reservoir quantity of .95 mean?

A

95% of service volume level

21
Q

Which reservoir contains the hydraulic fluid for reserve brakes and steering?

A

Center

22
Q

Why is the #2 center hydraulic pump low pressure light on prior to engine start?

A

Pump operation is inhibited to reduce electrical loads

23
Q

What is significant about the flaps when the hydraulic driven generator is in use?

A

Flaps operate at half speed due to reduction in hydraulic fluid

Atlas B767 Oral Prep (17 decks)

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