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Omni 767 > Hydraulics > Flashcards

Hydraulics Flashcards

1
Q

L Hydraulic system main functions

A

Flight controls

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2
Q

L and R System consist of

A

Reservoir
EDP
Electric demand pump

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3
Q

Where does the reservoir get it’s pressure from

A

Bleed air system

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4
Q

Do Electric demand pumps become inhibited on the ground

If so which and why

A

Yes
Left Electric demand pump
To reduce electrical load during engine start

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5
Q

R Hydraulic system main functions

A

Flight controls
Normal brakes
PES

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6
Q

C Hydraulic system main fuctions

A 
Flight Controls
Nose wheel steering
Flaps and slats
Alternate brakes
Landing gear
HDG
Tail Skid
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7
Q

What does the center system consist of

A

Reservoir
2 EDP’s
ADG
RAM Air Turbine Pump

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8
Q

What does the green PRESS light mean on the RAT panel

A

Rat is deployed

Rat is producing Hydraulic pressure

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9
Q

When does the HDG come on

A

When electrical power is lost on both AC busses

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10
Q

How does the HDG receive it’s pressure

A

The C Air Driven Pump operates continuously to ensure HDG stays pressurized

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11
Q

What does the RAT provide

A

It provides hydraulic power to the flight control portion of the Center Hydraulic System

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12
Q

At what speed does the RAT provide adequate Hydraulic power

A

130kts

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13
Q

Normal Hydraulic System pressure

A

3000psi

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14
Q

When is the left electric demand pump inhibited and why

A

On the ground during engine start when only one generator is running

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15
Q

How is the LEFT system hydraulic fluid cooled

A

By a heat exchanger located in the left Fuel tank

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16
Q

In the event of a Hydraulic leak how does the PES operate

A

Small amount of fluid trapped in the Left system

17
Q

How is the RIGHT system fluid cooled

A

By a heat exchanger located in the right fuel tank

18
Q

How is the Center system fluid cooled

A

By a heat exchanger located in the right fuel tank

19
Q

Which pump in the Center system load sheds and why

A

C2 pump, to reduce electrical loads

20
Q

When does the QTY light illuminate on the Hydraulic panel

A

When quantity less than 0.5

21
Q

When do the letters RF display on the Eicas Status page

A

When Quantity less than 0.75

22
Q

Which pump runs continuously while on the ground and flaps in T/O position

A

Center Air Demand pump and Right Electric Demand Pump

23
Q

When does the PES automatically supply power

A

When failure occures in both Ledt and Center Hydraulic systems

24
Q

How does the PES system function

A

Uses right hyd power to drive PTU.

PTU then pressurizes an isolated portion of the left system to power the PES

Omni 767 (10 decks)

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