Electrics

Question 1

How many generators are there?

Answer 1

5
4 engine driven
1 APU

Question 2

What generators are on Eng 1 and what are on Eng 2?

Answer 2

Eng 1 = Gen 1/3

Eng 2 = Gen 2/4

Question 3

How many switches control the two shed busses?

Answer 3

One switch controls both

Question 4

How are the generators cooled on the ground and in the air?

Answer 4

By a fan on the ground

NACA duct in flight

Question 5

What battery is used to start the APU?

Answer 5

Battery 2… via central bus

Question 6

What is the “backup” battery for

Answer 6

To provide stabilised power to the GCU

Question 7

When are the generators considered “online”?

Answer 7

When N2 > 56.4%

Question 8

Generator engine loads Amp and Time?

Answer 8

400A max cont
600A 5 min
800 A 10sec

Question 9

What bus is the GPU and APU connected to?

Answer 9

Central bus

Question 10

Does the GPU charge the batteries?

Answer 10

Naw

Question 11

If you are down to only 2 generators, what does the EDL do?

Answer 11

Shuts off the shed busses

Question 12

If you have lost all your generators, and the PFD MFD is still on, besides having a really bad day, what else is happening?

Answer 12

The EDL has failed

QRH

Question 13

What batteries does the airplane have?

Answer 13

2 x NiCad batteries 24V/44Ah

1 x Lead Acid 24V/5Ah

Question 14

How long will the batteries provide emergency power?

Answer 14

40 min

Question 15

What is the max bat temp?

Answer 15

70 degrees

Question 16

What is the purpose of the central bus?

Answer 16

To allow connection of the GPU/APU