Revision 1
10-7
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP
PILOT TRAINING MANUAL
FlightSafety
international
fluid remaining. This will show just above
the 1/4 mark on the quantity gage.
All ice warning annunciators are powered
from the PS2 bus bar. The fluid contents in-
dicator power is supplied from bus bar PE
when the airplane is on the ground, and bus bar
PS2 when in flight. Changeover is via the
squat switch.
WINDSHIELD ANTI-ICING
SYSTEM
The two forward-facing windscreens and the
left and right forward sidescreens are electri-
cally anti-iced using gold film heating ele-
ments laminated between the window panes.
Power for windscreen and sidescreen heating
is supplied by two 208/115 volt, frequency-
wild, three-phase, engine-driven alternators.
The alternators are controlled by two switches
in the roof panel ICE PROTECTION group
marked ALTERNATOR 1 and 2 with ON and
OFF positions (see Figure 10-3). ALTERNA-
TOR 1 powers the left windscreen, right
sidescreen and left stall vane. ALTERNATOR
2 powers the right windscreen, left sidescreen
and right stall vane. If an alternator fails, the
other automatically supplies both windscreens,
but both sidescreens are disconnected. Warning
of alternator failure is indicated by amber
ALTR 1 (or 2) FAIL annunciators on the roof
panel and the amber ICE PROT
↑
annuncia-
tor on the MWS panel.
Wi n d s h i e l d h e a t i n g i s c o n t r o l l e d b y t h e
SCREEN HEAT L and R ON/OFF switches in
the roof panel ICE PROTECTION group. The
SCREEN HEAT L controls power to the left
windscreen and right sidescreen. The SCREEN
HEAT R controls power to the right wind-
screen and left sidescreen. Windshield tem-
p e r a t u r e c o n t r o l p r o v i d e s t w o l ev e l s o f
temperature: a normal level and a raised level.
The raised level is only utilized when airborne
and an engine anti-ice switch is selected ON.
Windscreen overheat is indicated by the illu-
mination of the amber L (or R) SCREEN OVHT
and amber ICE PROT
↑
annunciators. The rel-
evant switch should be turned OFF, then ON.
If warning persists, the relevant windscreen
will be controlled at a higher temperature
than normal.
Sidescreen overheat is indicated by illumina-
tion of the amber SIDE SCRN OVHT and
amber ICE PROT
↑
annunciators. The affected
w i n d ow c a n b e i d e n t i fi e d b y t u r n i n g t h e
SCREEN HEAT switches OFF and then ON
one at a time. If warning persists, the relevant
sidescreen will be controlled at a higher tem-
perature than normal.
In the event of windscreen or sidescreen over-
heat, the associated annunciator remains il-
luminated, but the power supply cycles on and
off as the temperature (sensed by the over-
heat sensor elements) falls and rises.
Outer acrylic ply failure is identified by a sin-
gle crack; it will not affect the structural safety
of the airplane but will result in heating fail-
ure of the panel. Switch off the appropriate
SCREEN HEAT switch.
No. 1 engine alternator:
• Left windscreen heat
• Right side screen heat
• Left stall vane heat
No. 2 engine alternator:
• Right windscreen heat
• Left side screen heat
• Right stall vane heat
The PE bus bar supplies power to the following:
• ALTR 1 and 2 FAIL annunciators
• L and R SCREEN OVHT annunciators
• SIDE SCRN OVHT annunciator
• Left SCREEN HEAT ON–OFF switch
The PS2 bus bar supplies power to the following:
• Right SCREEN HEAT ON–OFF switch
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