APU

Question 1

An APU fire will (annunciator) …………………. and ……..the APU

Answer 1

illuminate the fire light and

shutdown the APU and discharge the fire bottle

Question 2

The aircraft Master Warning annunciators will
not illuminate if

Answer 2

if the APU FIRE light illuminates

Question 3

The APU FAIL light will illuminate if …………………………………. and
………………the start

Answer 3

the APU fire extinguisher bottle pressure is low
inhibits

Question 4

If the fire switch is not manually activated after
an eight second delay…what happens ?

Answer 4

• The ECU will automatically discharge the extinguisher bottle and
• deploy fire extinguishing agent into the APU enclosure.

Question 5

The APU FIRE switchlight may be manually depressed
to activate the …….

Answer 5

the APU fire extinguisher

Question 6

An APU start attempt in flight…………..after a dual generator failure.

Answer 6

is prohibited

Question 7

The APU generator amperage limits on the
ground and inflight are:

Answer 7

200 ground

230 flight

Question 8

The maximum altitude for APU operation
is…..

Answer 8

FL300

Question 9

In-flight APU starts are limited to…………(altitude)

Answer 9

FL 200 and below