Dash 1 - APU Flashcards
Which fwd fuel boost pump supplies fuel to the APU
3
With an illum LOW press light, an APU/MC will illum after
120 sec
During start, gravity fed fuel from which tank is used to fuel the APU
3 - After start, turn on #3 fwd bost pump
Place the START CONT switch to RUN for ___sec to verify 0 RPM
2
If start is aborted and switched to off RPM must return to 0 w/in___seconds
5 sec - Aircraft may be flown without APU if RPM is zero
If RPM does not return to 0, pull CB OVHD__
C15
RPM indicator may flash a value of approx ___ once or twice after switch is released to run
85%
If the indicator flashes ___ times or more, perform APU abnormal start procedure
5
At ___, the EGT should start to wind down
50%
Ignition occurs at what RPM ( evidenced by EGT increase)
7%
What is the normal operating temp
375 deg C
Ignition is deenergized at ____ and 2 seconds later the APU gen and bleed air are enabled
95%
The APU stabalizes at aprox ____
100% RPM
Approx ___ seconds after reaching 95%, the APU AVAIL light illum
2 sec
At max load, what will the EGT of the APU be
600 deg C
The APU inlet door will not close until RPM is less than
7%
Allow the APU to operate for a minimum of ___ before switching it off
2 min
APU shutdown is initiated when the ECU detects an overspeed of
104%
The APU DOOR DISAGREE mssg on the WAP may illum for up to
15 sec
If the APU is still running __ sec after the overspeed, the ECU will close the APU fuel valve
20 sec
When less than __%, the fuel fire shutoff valve on Rt wing spar and APU door will close
7%
