APU

Question 1

What is the regulated Power Output of the APU Generator?

Answer 1

28 v DC 400 amp

Question 2

From where does the APU draw its fuel?

Answer 2

LH Collector Tank

Question 3

What does the Amber WARN Legend on the APU Panel indicate?

Answer 3

The GEN function is not online and so batteries may be discharging.

Question 4

What are the indications the the APU Generator is on line?

Answer 4

Green ON light on the GEN switch. ELEC SYS Load on APU gen.

Question 5

What would prevent a serviceable APU generator from coming on line?

Answer 5

EXT PWR switch ON, Engine bleed switch to ON.

Question 6

What will cause a serviceable APU to shut down?

Answer 6

Use of the FIRE Test Button on the Fire protection panel. WOW sensors on take-off

Question 7

What should happen in the event of an APU Fire?

Answer 7

APU Fire Warning - Automatic Shutdown, within 7 seconds, Automatica Fire Suppression.

Question 8

What are the Starter Cranking Limits for the APU?

Answer 8

60 secs on, 5 mins off, 60 on Maint’ action required

Question 9

The APU gen cannot operate at the same time as an engine DC gen, true/false?

Answer 9

False

Question 10

When is APU Running not permitted?

Answer 10

Starting Checks, Start No. 1 is APU starting, on EXT PWR

Question 11

What is the APU Post-automatic Shut-down Procedure?

Answer 11

Check APU Control panel, confirm shut down, BLEED, GEN and PWR selected off, Do not restart

Question 12

What will generate an APU Automatic Shut-down?

Answer 12

APU fault or fire, take-off, overspeed or under-speed