APU Flashcards
The APU provides ____.
both electrical power and pneumatic air
The APU start cycle may take as long as ____.
120 seconds
With the APU operating, turning OFF the battery switch will cause the APU to ____.
shutdown immediately
Fire protection for the APU is provided by ____ fire extinguishing bottle(s).
1
The APU fire extinguishing agent discharges ____.
manually only
The APU can be started with electrical power from ____.
AC Transfer Bus 1 or the airplane battery
With the APU blue MAINT light illuminated, the crew ____.
may continue to use the APU if needed
The APU EGT is displayed on the ____.
forward overhead panel
In order to start the APU on a cold, dark airplane, the ____.
battery switch must be ON, the cockpit APU fire handle must be IN, and the ground control panel fire handle must be IN
The APU can be started at altitudes up to ____ feet.
41,000
The APU Start Switch has ____ positions labeled.
OFF, ON, and START
The maximum altitude for use of APU bleed air and electrical power is _____ feet.
10,000
The maximum altitude for use of APU bleed air only is _____ feet.
17,000
If airborne and the battery is the only available power source, APU start attempts are not recommended above ____ feet.
25,000
On the ground, the APU ____.
will power both transfer busses
