APU

Question 1

What is the primary function of the APU?

Answer 1

Starting engines

Question 2

What is the APU fuel burn?

Answer 2

150 lbs. per hour

Question 3

Is there an external APU shutoff?

Answer 3

Yes, External Power Control Panel below the right engine

Question 4

APU gets fuel from where?

Answer 4

Right collector tank

Question 5

How is fuel fed to the APU?

Answer 5

Right fuel pump until RT engine is running, then ejector pump supplies the fuel

Question 6

You are being de-iced prior to departure. What must you consider regarding the APU?

Answer 6

De-icing with the APU running is prohibited

Question 7

Prior to starting the APU you should ensure what minimum battery voltage?

Answer 7

20.5 volts ***(Flexjet CFM)

Question 8

What does the APU provide us with?
(4)

Answer 8

Bleed air for air conditioning, pressurization, engine start and DC Power

Question 9

How many fire bottles are dedicated to the APU?

Answer 9

1-the number two bottle

Question 10

Is the APU fire protection system automated while on the ground?

Answer 10

Yes, it will shutdown and discharge the number two bottle

Question 11

Can the APU be operated with the APU generator inoperative?

Answer 11

Yes per the MEL

Question 12

What happens with the batteries when starting the APU?

Answer 12

The Right battery PBA shows off and is powering only the APU starter.

The Left battery is powering the rest of the aircraft including the start logic for the APU.

Question 13

What APU is installed?

Answer 13

Honeywell 36-150BD