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767 review > 767 Hydraulics > Flashcards

767 Hydraulics Flashcards

1
Q

What does the system pressure light mean?

A

The System pressure is low.

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2
Q

What does the QTY/RSVR light mean?

A

The reservoir is half full.

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3
Q

What do the pump PRESS light mean?

A

HYD pump pressure is low.

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4
Q

What does the OVHT light mean?

A

HYD pump temperature is high.

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5
Q

Which center electric HYD pump is load shed and when?

A

The # 2 pump is shed with only one power source.

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6
Q

When does the ADP HYD pump operate when in the auto position?

A

It operates with low center system pressure or in anticipation of high demand loads.(ex: gear and flap operation)

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7
Q

When do the L/R electric demand pumps operate in the auto position?

A

When primary system pressure is low.

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8
Q

How is each HYD reservoir pressurized?

A

Its respective Bleed air system.

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9
Q

What items are on the Left HYD System?

A 
Aileron
Rudder
Elevator
L Reverser
Rudder Ratio
Stab trim via the PES
Spoilers
Servos
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10
Q

What items are on the Center HYD System?

A 
Aileron
Rudder
Elevator
Landing Gear
Flaps and Slats
HDG
Nose Wheel Steering 
Alternate Brakes
Stab Trim
Spoilers
Servos
RAT
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11
Q

What items are on the Right HYD System?

A 
Ailerons
Rudder
Elevator
Normal Brakes
Pitch Enhancement System
R Reverser
Spoilers
Servos
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12
Q

What HYD system is the normal brake system located?

A

Right

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13
Q

What HYD system is the Alternate brake system located?

A

Center

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14
Q

What hydraulic system is the Reserve brake system located?

A

Center via the C1 electric pump.

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15
Q

Which brake systems have anti-skid?

A

All, individual skid protection for the normal and accumulator. Paired wheels for alternate and reserve brake systems.

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16
Q

What happens to the brake system with a loss of the right HYD system?

A

The alternate brake system automatically takes over. There is no notice that this has happened.

17
Q

What happens if the alternate brake system now fails?

A

If the center reservoir drops below standpipe the isolation valves close and the Reserve Brake system via the C1 electric pump.

18
Q

What is the RAT?

A

Ram Air Turbine - it can power the center flight controls only.

19
Q

When does the RAT arm?

A

Arms at 80 knots.

20
Q

When does the RAT deploy?

A

Automatically with a loss of both engines or manually by pressing the switch.

21
Q

When does the HDG operate?

A

The loss of both main AC busses.

22
Q

What is the PES?

A

Pitch enhancement system. Provides stab trim backup if both L and C hydraulic systems fail.

23
Q

How does the PES work?

A

It uses the R HYD system to run a motor that uses trapped L hydraulic system fluid to move the stab trim.

24
Q

How fast does the PES move the stab trim?

A

1/4 rate

25
Q

How do you actuate the PES?

A

Electric control column switches(alternate and automatic inop) thus no autopilot trimming.

26
Q

Why is there a a huge penalty with the ADP inop?

A

Because, with the loss of an engine during take off you can’t get the gear and flaps up to maintain the 2.4% climb gradient.

27
Q

When is the ADP inhibited?

A

With wing anti-ice.

28
Q

What type of power is used for the ADP?

A

DC power and automatically powered when the HDG is running.

29
Q

Degree of rudder pedal and tiller steering?

A

rudder-7 degrees, tiller-65 degrees

30
Q

Turn radius of a 767-200 and 767-300?

A

200-129’ and 300-146’

31
Q

How is the L, C, and R hydraulic system fluid cooled?

A

L system fluid cooled via left fuel system. C & R system fluid cooled via the right fuel system.

32
Q

What is the electric power source for the L & R electric HYD pump?

A

L- R main AC bus
R- L main AC bus
So a loss of an engine does not result on a loss of same side electric pump.

33
Q

Which brake system will autobrakes operate?

A

Normal only. No right HYD system pressure no autobrakes.

34
Q

How is HYD fluid measured?

A

In percentage.

35
Q

What is the minimum HYD quantity?

A

No number, only a magenta RF(refill) indicates 75% remaining.

767 review (8 decks)

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