Electrical systems

Question 1

What does IDG stand for?

(FCOM 6.20.1)

Answer 1

Integrated Drive Generator

Question 2

How many AC power sources are available to the aircraft?

(FCOM 6.20.1)

Answer 2

• 2 IDGs
• 1 APU generator
• 2 External power outlets

Question 3

What turns on an IDG DRIVE light?

(FCOM 6.20.2)

Answer 3

Low oil pressure.

Question 4

What would cause the IDG to disconnect automatically?

(FCOM 6.20.2)

Answer 4

High oil temp.

Question 5

What does the AVAIL light on the Primary EXT Power switch represent?

(FCOM 6.20.3)

Answer 5

External power plugged in with acceptable voltage and frequency.

Question 6

What bus normally powers the ground service bus? Is there an alternare means to power the bus?

(FCOM 6.20.5)

Answer 6

• Right main bus
• Yes, APU generator or Primary EXT PWR

Question 7

What is the power source for the ground handling bus?

(FCOM 6.20.5)

Answer 7

Primary Ext PWR or APU Gen.

Question 8

What would have to occur for a Backup generator to power essential airplane equipment?

(FCOM 6.20.7)

Answer 8

Both IDGs and the APU gen are inop.

Question 9

Within the backup generator are PMGs that are used to power what?

(FCOM 6.20.7)

Answer 9

Flight control DC electrical system.

Question 10

What altitude is the airplane limited to with the RAT extended?

Answer 10

43,100’ (aircraft service ceiling)