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Omni 767 > Electrical > Flashcards

Electrical Flashcards

1
Q

Why would APU GEN OFF light illuminate

A

Generator break open because of a Fault

Switch selected off

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2
Q

When does Bus Tie ISLN light illuminate

A

Fault occurred

Bus Tie Switch pushed out

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3
Q

GEN CONT switches
On
Off

A

On - arms the gen breaker to close automatically
Off - opens gen breaker
Resets fault trip circuitry

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4
Q

GEN DRIVE DISC switches

A

Off - disconnects the Gen Drive

Has to be reconnected by MX

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5
Q

GEN DRIVE switch - DRIVE light illuminates when

A

Gen drive Oil low pressure/high temperature

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6
Q

What happens when you turn the BATT switch to ON

A

A few Annunciator lights illuminate

Allows for the Apu to start

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7
Q

STBY Power Selector
Off/Auto/Bat
What does each position mean

A

Off - Stby busses unpowered
Auto - Stby busses transfer to Bat if AC power is lost
Bat - Stby busses powered from Main & APU batteries

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8
Q

STBY POWER off light means

A

AC or DC stby bus unpowered

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9
Q

Purpose of Hydraulic Driven Generator

A

Operates automatically as backup source of power in the event of a loss of both AC busses

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10
Q

Source order for powering Main Busses

A

Respective IDG
APU
Opposite IDG

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11
Q

Do we have control of the Galley buses

A

Yes, but pressing/depressing the Utility Bus switches

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12
Q

Which bus normally powers the Ground Service Bus

A

Right Main AC Bus

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13
Q

What does the Ground Service Bus power

A

Main Bat charger
APU Bat charger
Miscellaneous

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14
Q

Can the Ground Handling bus be powered in-flight

A

No

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15
Q

Where does the Ground Handling Bus get it’s power from

A

APU Gen

GPU

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16
Q

How are the captains flight instruments powered if both Main AC buses fail

A

Via the HDG

17
Q

Load shedding priority

Can power be restored

A

Galley Buses
Utility Buses
Individual equipment powered by Main AC buses

Yes, if load decreases or additional power source becomes available

18
Q

What does the DC Hot Bat Bus power

A 
Fire Extinguisher Bottles
Fuel SOV's 
Clocks
Rat Manual Deployment 
Parking Brake Valve
19
Q

Each Main Bus Supplies power to

A

Associated Utility and Galley buses
Flight Instrument Transfer bus
Associated TRU

20
Q

Ground Service Bus is normally powered by

A

The right main AC bus

21
Q

Load shed sequence if system detects loads that exceed power available

A

Galley busses
Utility busses
Individual equipment

22
Q

During Engine start what busses are shed
First engine
Second engine

A

During first engine all Galley and Utility busses shed

During the second engine start associated side Util and galley busses shed

23
Q

Hot battery bus powers

A 
Fire extinguisher bottles
Fuel SOVs
Rat Manual deployment
Apu SOV
Clocks
Parking Brake Valve

Omni 767 (10 decks)

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