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Ground > Electrical System > Flashcards

Electrical System Flashcards

1
Q

Types of CB we have?

A

Thermal

Electrical (in MCDU)

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2
Q

How are the Batteries charged?

A

Through any AC power source

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3
Q

What is the GPU checked for before we get AVAL?

A

VOLTS/AMPS/FREQ

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4
Q

Power priority?

A

IDG, APU, GPU, OPPOSITE SIDE IDG

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5
Q

Important items on hot batt bus?

A

Refuel panel

Engine fire protection

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6
Q

What is the min battery voltage?

A

22.5v

21-22.4v requires recharge

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7
Q

When you turn on the batteries what are you looking for?

A

IESS
22.5 volts
screens 2 and 3

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8
Q

How do we check the battery temp?

A

We have to have AC power.

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9
Q

What does a TRU do?

A

AC>DC

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10
Q

What does our 1 inverter do?

A

Converts batt 1 DC to AC power for the ignitors for engine start without AC power

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11
Q

What is on AC essential bus?

A

Flap channel 1
Slat channel 2
ACFP 2
ACMP 3A

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12
Q

How long for RAT to deploy? What message should go away?

A

8 sec

BATTERY DISCHARGE

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13
Q

Why does battery 2 have an auto position?

A

Because it can either power either DC bus 2 or APU start bus

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14
Q

How long can batteries power essential loads?

A

10 min and 2 APU start attempts

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15
Q

How long should we wait after starting engine to disconnect the APU or GPU?

A

30 Sec

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16
Q

What will you have in an electrical emergency?

A

Screens 2,3
NAV 1/COM 1
IRS 1
CCD 1

FMS 2
MCDU 2
GPS 2

17
Q

What EICAS messages will you get?

A 
Electrical emer
Batt Discharge (until RAT deploys)
18
Q

What does the inverter do?

A

Powers the Ignitors

19
Q

When the RAT deploys what message will go away?

A

BATT DISCHARGE

20
Q

Does the RAT stay attached to the AC essential bus once normal AC power has be reestablished?

A

YES

21
Q

What do we have to think about when RAT deploys prior to landing?

A

FLAP 3 Landing

22
Q

Pump unloader VALVE system 3?

A

Lowers the amount of power to to start the pump?

23
Q

Flow limiter system 3?

A

Limit the amount of power to keep the pump going.

Ground (20 decks)

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