AUXILIARY
POWER UNIT
AIRPLANE
OPERATIONS
MANUAL
2-09-05
Page
10
Code
01
REVISION 37
AOM-145/1114
CONTROLS AND INDICATORS
APU CONTROL PANEL
1 - APU MASTER KNOB
OFF - Deenergizes the ESU (or FADEC), closes the APU fuel
shutoff valve, turns off APU indications and alarms
whenever APU RPM is below 5%, and commands APU
shutdown.
ON - Energizes the ESU (or FADEC), commands the fuel shutoff
valve to open, enables indication and alarms on the EICAS
and allows the APU to keep running after starting.
START (momentary position) - Initiates start cycle.
2 - APU STOP BUTTON
Shuts the APU down.
NOTE: APU EICAS indications remain operational.
3 - APU FUEL SHUTOFF BUTTON (GUARDED)
Cuts off fuel to the APU.
A striped bar illuminates inside the button to indicate that it is
pressed.
APU CONTROL PANEL
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