ATA 49 Flashcards
Where is APUC located
a In aft cargo compartment
b In main equipment center
c In ceiling of aft galley
How can you supply APUC power when APU is off
a Use APU maintenance switch on P61 panel
b Use APU maintenance switch on P40 panel
c Use power switch on APUC
Where is located the APU data memory module
a Next to APUC
b In main equipment center
c On APU
The APU inlet door is located at
a Upper right side of tail cone
b Upper left side of tail cone
c Bottom of tail cone
When is APU OIL QTY status message shown
a APU oil quantity is 3.8Q or less
b Oil quantity/ sump temperature sensor failed
c Both are correct
How do you know if electric starter brush is worn to limit
a Brush wear indicator on starter shows yellow
b Brush wear indicator on starter shows red
c Brush wear sensor send signal to APUC to give message
What condition caused APU autostart in the air
a L and R transfer buses loss power
b L and R main buses loss power
c L and R DC bus loss power
How do you shut down an APU after autostart
a Move APU selector to START and then back to OFF
b Move APU selector to ON and then back to OFF
c Move APU selector to START and then back to ON
What APU will do if overload condition occurs
a Increase fuel flow
b Shutdown APU
c Closed IGV to give priority to electrical power generation
During APU start, the surge control valve is posiotioed to
a Full close
b Full open
c Intermediate position
How many EGT thermocouple are installed on APU
a 2
b 4
c 6
To do APU pneumatic start what is the position of APU bleed switch
a Auto
b Off
c Out
Which is normal APU shut down
a Shut down using APU switch on P5 panel
b Shut down using APU shutdown switch on P40 panel
c Shut down using APU fire handle on P5 panel
How to reset APU control system after APU is shut down from P40 panel
a. Reset battery switch
b. Do Fire/OVHT test
c. Turn APU selector switch to OFF and back to ON
APU LIMIT caution message displayed means
a. APU is operating for long time already and you should turn off APU
b. Low oil pressure or hight EGT or hight oil temperature
c. APU cycles exceeds overhaul limit
APU can supply pneumatic
a. At any altitude
b. At flight level below 22000ft
c. Only on ground
When can you use Air turbine starter to start the APU
a. Only on ground
b. Only in the air
c. On ground and in the air
APU can supply electrical power 120 KVA
a At any altitude
b At flight level below 22000ft
c Only on ground
You use APU maintenance switch on P61 to (B1, B2)
a. Supply electric power to APUC when APU is off
b. Reset APU
c. Start APU by electric motor
After shutdown APU using APU shutdown switch on P40, to reset the system you must (B1, B2)
a. Cycle main battery switch
b. Cycle APU maintenance switch on P61
c. Do the fire test
If you want to start APU after a protective shutdown, you must (B1, B2)
a. Replace APUC
b. Move APU start selector to OFF
c. Reset APU maintenance switch on P61
Air starter will start the APU when (B1)
a. Electric starter fails
b. Airplane is in the air
c. Pneumatic pressure is available
APU oil is cooled by (B1)
a. Turbine air
b. Air in APU compartment thru air/oil heat exchanger
c. Fuel
APU is protected against surge by (B1)
a. Releasing Load Compressor air thru Surge Control Valve to APU exhaust
b. ELMS
c. Surge valve when airplane is in the air
