Electrical

Question 0

With ground power both CCRs are energised, and take how long to come on line?

Answer 0

About 3 minutes

Question 1

If no external power is connected and APU and engines are off, pushing the battery switch on -
Will energise which CCR?
How long will it take?
How will you know it is on line?

Answer 1

Left common core resource
About 1 minute
CDU shows on lower DU when L CCR is online

Question 2

Does EXT power need to be selected on to power ground handling?

Answer 2

No. AVAIL needs to be shown though. The first ext power connected supplies the AC buses. See synoptic to verify this. Only one green flow bar will show.

Question 3

Can aft external power energise the main busses?

Answer 3

No. It is just for engine start, and some maintenance functions.

Question 4

Which engine can be started using the aft external power?

Answer 4

Right only.

Question 5

How many starts attempts should you get from the APU battery?

Answer 5

3

Question 6

If on standby power, which displays will show?

Answer 6

All the Captain’s DUs and ISFD

Question 7

What is the source of the standby power?

Answer 7

Main battery, and RAT

Question 8

How many types of circuit breakers are there?

Answer 8

Electronic and thermal breakers.

Question 9

Can you operate TCBs (thermal CB) from the flight deck?

Answer 9

No

Question 10

How do you access the CB control?

Answer 10

SYS then CB tab (lower right)

Question 11

On the display how can you tell the difference between an open TCB and an open ECB?

Answer 11

ECB solid white

TCB diagonal white lines