Hawker 800 XP, Pilot Training Manual

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6-12
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP PILOT TRAINING MANUAL
FlightSafety
international
GENERATOR Switch
The GENERATOR switch is a three-position,
ON–OFF–TRIP switch that provides for con-
trol of the APU starter-generator. For more in-
formation on the APU generator, see Chapter
2, “Electrical Power Systems.”
APU Test Panel
General
An APU test panel forms part of the APU con-
trol panel and contains the following switches.
OVERSPEED Test Switch
When pushed, the switch tests the overspeed
detection system and turns on the amber
FAULT light on the APU annunciator panel.
The switch will also shut down the Turbomach
T62T-40 APU.
ANNUNciator Test Switch
The ANNUNciator test switch is a two-posi-
tion, momentary pushbutton switch. When
pushed, all lights on the APU annunciator
panel will come on as will any optional lights
on the master warning lights panel.
FIRE Test Light
This two-position, momentary switch, when
pushed, will turn on the red FIRE light, the air-
plane’s master warning flashing lights, the
fire bell, and the APU warning light on the
MWS panel.
The APU annunciator panel also includes a
green light marked “GEN ON DC BUS.” This
light will illuminate to indicate that the APU
starter-generator is supplying DC power to
the distribution system.
The amber GENERATOR OVERHEAT light
will come on if the operating temperature ex-
ceeds a preset value.
The red FIRE light will come on if a high tem-
perature or fire exists in the APU area. Fire
and/or overheat will automatically close the
bleed-air valve.
An amber FAULT light will come on for the
following conditions:
• Low oil pressure
• High oil temperature
• High EGT
• Overspeed
EGT Gage
T h e E G T g a g e i s c a l i b r a t e d i n d e g r e e s
Fahrenheit and receives inputs from a ther-
mocouple probe mounted in the exhaust duct.
APU RPM
The APU rpm gage receives input from the
tach generator driven by the APU reduction
drive assembly. The APU rpm is calibrated
in percent of design maximum.
APU Ammeter
The APU ammeter indicates the output of the
APU generator to the DC bus system.
PROTECTION
General
An APU protection system provides for au-
tomatic APU shutdown if (1) the APU EGT ex-
ceeds a predetermined value, (2) the APU oil
pressure drops to a low value, (3) the APU rpm
exceeds a predetermined value, or (4) an APU
fire is detected.
NOTE
If the APU is shut down for fire warn-
ing, restart cannot be accomplished
until the APU fire reset switch, lo-
cated on panel ZK, has been reset.