APU

Question 1

If an APU Fire is detected on the ground:

Answer 1

The APU automatically shuts down and the halon extinguisher is automatically discharged.

Question 2

The APU may be started and operated in flight. Which of the following is also true?

Answer 2

The APU may be operated up to the maximum certified pressure altitude of 39,000 feet.

Question 3

You have just selected the APU MASTER SW pb to ON. You now select the APU START pb to ON. Which statement is correct?

Answer 3

The ECB will not engage the electric starter until the power-up self test is completed satisfactorily and the air intake flap is fully open.

Question 4

How do you start the APU?

Answer 4

Press the APU MASTER SW pushbutton, followed 3 seconds later, by the APU START pushbutton.

Question 5

Normally, how do you shut down the APU?

Answer 5

Press the APU MASTER SW pushbutton only.

Question 6

Fuel for APU operation is normally supplied from:

Answer 6

The left fuel feed line, through the engine 1 feed line.