Aux Power Unit, page 05-10-1

Question 1

What is the minimum wait time after shutdown to check the oil level in the APU

Answer 1

30 Minutes minimum

Question 2

After shut down of the APU prior to opening the Gen/adapter oil filler cap what should be accomplished?

Answer 2

Push and hold the pressure-relief valve cap for 5 sec

Question 3

Where does fuel normally come from for the APU

Answer 3

Right wing tank

Question 4

If the APU fuel pump in the Right wing is inop is there a backup system

Answer 4

Yes, from the Left engine fuel manifold

Question 5

What is the NOTE associated with using the alternate fuel system for the APU

Answer 5

APU is time limited from startup to shut down. Check the MEL. Basically used to start an engine and then shutdown.

Question 6

Why is there a time limit alt fuel system

Answer 6

Due to prevention of fuel to enter the fuel-oil heat exchanger

Question 7

Were is the APU battery located

Answer 7

In the aft equipment bay under the APU

Question 8

How much time should be waited before applying bleed air from the APU

Answer 8

2 Min after reaching 100%

Question 9

What are the 10 things that will automatically shutdown the APU

Answer 9

ECU failure, Fire, Overspeed, Over Temp, Low oil Press, High oil temp, Gen Adapt low oil press, Gen Adapt high oil temp, Loss of EGT sensor, underspeed.

Question 10

If an emergency shutdown of the APU is needed how can this be done

Answer 10

by using the STOP Button on the APU Fault Panel located on the Left Rear Fuselage

Question 11

What must be accomplished prior to starting the APU after an emergency shutdown using the APU fault panel

Answer 11

The APU switch/lights on the overhead panel must be pressed out