APU Flashcards
There is/are ____ fire extinguisher bottle(s) available for APU fires.
One
Bleed air is available from the APU through approximately ____ feet.
22,000
Which statement is true concerning the APU supplying bleed air and electrical power?
Electrical power has priority over bleed air.
APU RPM is read on ____.
any of the 3 MFDs with status (STAT) selected
The main airplane battery powers the APU ____.
inlet door, fuel valve, and the fire detection system
If the APU start fails, the APU ____.
shuts down automatically
Do not start or shut down the APU ____.
if a fuel spill occurs
The APU has 2 operating modes, attended and unattended. The APU will not shut down for high EGT, high oil temperature, or low oil pressure in ____ mode(s).
the attended
The APU is in the unattended mode ____.
only on the ground without either engine starting or running
In the attended mode, the APU will continue to operate for ____.
low oil pressure
In flight, if both AC transfer busses lose power, the APU ____.
starts automatically
Do not start or stop the APU should a fuel spill occur.
True
On a 777-300ER, when APU is selected to the SEL-APU field after both engines are running but before takeoff, the bleed air supply immediately configures for APU to pack takeoff. What supplies air to the C2 air demand pump during Takeoff?
The right engine provides air to air demand pump C2
APU to Pack Operations (777-300ER) takeoffs are prohibited at airports above ___ feet pressure altitude?
6900
When starting the APU, the APU Selector should be placed in the Start position for ____ second(s).
1
The APU RUNNING memo message is located on the ____.
EICAS Display
APU operating conditions (EGT, RPM, Oil Press, etc.) can be monitored on the ____.
Status Page
When starting the APU, the APU selector should be ____.
positioned to START for one second, then positioned to ON
After APU start during preflight, the APU is running in the unattended mode. It changes to the attended mode ____.
when either engine is starting or running
When operating the APU in the attended mode, ____ faults will result in the EICAS message APU LIMIT.
high EGT, high oil temperature, low oil pressure
What is the indication that the APU is operating normally?
The memo message APU RUNNING is displayed on EICAS
When the APU is operating in the Unattended Mode, what will occur if an APU fire is detected?
The APU shuts down automatically and the APU fire bottle is discharged.
APU electrical power should be available throughout the aircraft’s operating envelope.
True
What is the indication that the APU is operating normally?
The memo message APU RUNNING is displayed on EICAS
APU bleed air is available throughout the airplane operating envelope.
False
When is electrical power available from the APU?
Throughout the airplane operating envelope
What will cause the amber APU FAULT light to illuminate?
APU shutdown due to fault and/or fire
APU fault and/or fire is detected
APU controller self-test
All answers are correct
