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Kalitta Air B777F > Systems - Hydraulics > Flashcards

Systems - Hydraulics Flashcards

1
Q

What does the PRESS light mean on the RAT switch?

A

RAT is deployed and the C Hyd system PFC pressure is greater than 1500psi

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2
Q

When pressurizing the hydraulic system, which pump is turned on first and off last? Why?

A

Right demand pump on first and off last to prevent fluid transfer into the right system

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3
Q

What is the purpose of demand pumps?

A

To assist the primary pumps in high load situations

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4
Q

When will the demand pumps run?

A
  • Right engine demand pump will run after engine start until after TO.
  • The C1 and C2 center demand pumps run during flap extension on the ground, and at 60kts on the TO roll until gear retraction.
  • During gear extension only one center demand pump activates.
  • C1 and C2 demand pumps can only run one at a time if in the ON position.
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5
Q

What does the fault light mean?

A

High fluid temp or low pump press

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6
Q

Which systems have standpipes?

A

All three systems

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7
Q

What are these standpipes for?

A

To allow for the minimum fluid to remain for system operation

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8
Q

What systems receive hydraulic power from the RAT?

A

Center Hyd

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9
Q

What causes the BRAKE SOURCE light to illuminate?

A

When down to only the accumulator pressure with Center and Right HYD system pressures low

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10
Q

The center hydraulic system has how many demand pumps?

A

C1 and C2

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11
Q

What is their power source?

A

Bleed air

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12
Q

What other component of the HYD system uses bleed air?

A

HYD reservoirs for pressurization

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13
Q

Do both of these pumps operate simultaneously?

A

If in auto then yes during flap extension on the ground and for TO at 60kts to gear retraction

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14
Q

Which one will operate if both are turned on?

A

C1

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15
Q

On the ground which if any demand pumps run continuously?
Why?

A

The R system electric demand pump runs continuously after engine start for the Normal Brake system

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16
Q

Which demand pumps if any operate during T/O and LDG?

A
  • T/O the L, R system demand pumps operate continuously, C1, C2 demand pumps turn on at 60kts
  • LDG the L, R system demand pumps operate continuously, C1 normally operates during high loads and gear extension.
17
Q

If center hydraulic quantity is low and airspeed is > 60 kts, what happens?

A
  • Alternate brakes are isolated from the C system and remain operable using reserve fluid
  • Nose gear actuation and steering are isolated until <60kts and pressure to the C sys flight control is low or the gear is selected down, both engines normal, both engine driven pumps are providing pressure.
18
Q

Of the two center hydraulic system primary pumps, which one is load shed?

A

C2

19
Q

Where can you find Hydraulic fluid quantity data?

A

Status page

20
Q

On that page what do the following mean?
* LO
* OF
* RF

A
  • LO (amber) quantity is low
  • RF (white) needs refill and is inhibited inflight
  • OF (white) reservoir is over full and is inhibited in flight
21
Q

What will cause the main battery to power the standby electrical system instead of the RAT?

A

During load shedding while it is prioritizing Hyd Press

22
Q

Can the RAT be deployed on the ground with the cockpit switch?

A

Yes

23
Q

Name the hydraulic components for each of the three systems.

A

LEFT
* thrust reverser
* flight controls

CENTER
* altn/rsv brakes
* slats/flaps
* flight controls
* nose gear/main gear steering/actuation

RIGHT
* normal brakes
* brake accumulator
* thrust reverser

24
Q

When will RTO braking operate?

A

Above 85kts

25
Q

How can autobrakes be disengaged?

A
  • pressing the brake pedals
  • stowing the speedbrake handle
  • manually position the switch
  • advancing one thrust lever
26
Q

What system provides deceleration data to the autobrake effort?

A

ADIRU

Kalitta Air B777F (20 decks)

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