Electrical System

Question 1

What is the sequence logic for finding power on order when activating the electrical system?

Answer 1

1. IDG
2. APU
3. GPU
4. IDG #2 from the opposite side

Question 2

How many batteries are installed and what type of characteristics they posses?

Answer 2

2 Sealed lead acid batteries. 24 volts 28 Amp. one in the front and one in the rear. Charged by DC power through the electrical system.

Question 3

How long would the system run on using only the electrical battery source?

Answer 3

10 min

Question 4

What Items are always powered regardless of the battery switch?

Answer 4

Hot busses: fire protection and fueling capabilities as well as some lights. (there’s some more stuff but it’s small)

Question 5

What is the difference between AC GPU and DC GPU?

Answer 5

AC can power the whole aircraft, DC used to assist starting the APU

Question 6

When does the GPU switch show “Available”?

Answer 6

when it detects proper:
Frequency
Amperage
Voltage

Question 7

What will happen if you disconnect GPU while having the GPU switch engaged?

Answer 7

The system won’t allow you to reconnect untill the button has been pushed in

Question 8

What will happen if less than 5 min remain on the battery?

Answer 8

Chime will sound

Question 9

How many batteries are needed to start the APU and why?

Answer 9

2. 1 arms the FADEC and the second Allowed it to be started

Question 10

what’s on the AC essential BUS?

Answer 10

AC motor Pump 
1 slat 
1 flap
acmp3a
AC fuel pump 2

Question 11

How many batteries are there really?

Answer 11

4. Fly by wire back up battery (15min)+ slides on the ac