Revision 1
6-4
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP
PILOT TRAINING MANUAL
FlightSafety
international
REVOLUTIONS
PER MINUTE
METER
EXHAUST GAS
TEMPERATURE
METER
GENERATOR
CURRENT
METER
WARNING
INDICATORS
LAMP
TEST
SWITCH
BLEED
VALVE
SWITCH
APU STOP
BUTTON
FIRE/WARNING
LIGHT/SWITCH
FIRE
EXTINGUISHER
MANUAL
BYPASS
SWITCH
APU
MASTER
SWITCH
GENERATOR
TRIP
SWITCH
OVER
VOLTAGE
TRIP
SWITCH
Figure 6-2. APU Control Panel
• STOP Button
—Initiates action to the
ECU to shutdown APU.
• APU FIRE/PUSH TO TEST Switch
—
Illuminates red when fire detectors sense
a n o v e r t e m p e r a t u r e c o n d i t i o n .
Depressing switch tests fire detection
circuit and silences fire bell.
• FIRE EXT Switch
—Initiates action to
the ECU to shutdown APU. Manually
discharges fire extinguisher.
• L OW O I L P R E S S A n n u n c i a t o r
—
Illuminates amber when oil pressure is
less than 35 psig. APU shuts down.
• H I G H O I L T E M P A n n u n c i a t o r
—
Illuminates amber when temperature is
above 325° F. APU shuts down.
• B L E E D A I R V A L V E F A I L
Annunciator
—Illuminates amber if load
control valve fails to close when BLEED
AIR switch is set to CLOSE.
• APU GEN Annunciator
—Illuminates
amber when generator is off line.
• B L E E D A I R O N A n n u n c i a t o r
—
Illuminates green when load control
valve opens.
APU Starting
The APU may be started using either the aircraft
batteries or an external ground power source.
If fire extinguisher pressure is below minimums,
the APU will not start.
Before Starting
1. Fire extinguisher gauge:
Check at or above ......300 psig at –40°F
575 psig at +70°F
2. Circuit breakers ..............................Set
3. APU master switch ........................OFF
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