Hawker 800 XP, Pilot Training Manual

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Revision 1 10-9
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP PILOT TRAINING MANUAL
FlightSafety
international
Figure 10-6 illustrates the electrical opera-
tion of the windshield anti-icing system.
PITOT/VANE HEAT
SYSTEM
The following components are electrically
h e a t e d f o r i c e p r o t e c t i o n t h r o u g h t h e
P I T OT / VA N E H E AT L a n d R O N / O F F
switches located in the roof panel:
• Left and right pitot heads and support masts
• Left and right forward static plates
• Two rudder bias struts
• Left and right airflow angle sensors
Each pitot head contains an electrical heating
element controlled by a PITOT/VANE HEAT
L or R ON–OFF switch. Each switch also con-
trols one element of a double element heating
muff fitted to each of the two rudder bias struts.
A PITOT HTR FAIL annunciator and the MWS
ICE PROT
↑
repeater annunciator illuminate
whenever a PITOT/VANE HEAT L or R switch
is OFF, or when both switches are on and the
current draw by either pitot head element is in-
sufficient. Annunciator dimming is via the
MWS dimmer.
A single ammeter and an L–R selector switch
are provided (see Figure 10-3). Selecting L or
R connects the ammeter to the associated pitot
h e a d a n d m a s t h e a t e r c i r c u i t s . Wi t h
PITOT/VANE HEAT switched on for at least
1 minute, readings of between 5 and 10 amps
indicate satisfactory operation of the pitot
heaters only. Actual power consumption de-
pends on the ambient temperature.
If a PITOT HTR FAIL annunciator illumi-
nates while the switches are on, the system
ammeter is used for identification of the
failed heater (current below 1 amp).
Associated instruments must be monitored
for discrepancies.
Autopilot performance may be ad-
versely affected.
With pitot heat failure, the following equip-
ment may fail to operate satisfactorily.
The left and right forward static plates are elec-
trically heated. The electrical power supply to
the heating element of each static plate is via the
PITOT/VANE HEAT R switch through the land-
ing gear squat switch. Heating is available only
when the airplane is airborne.
Ice protection for each airflow angle sensor is
provided by a vane heater element and a case
heater element. The case heater element is
thermostatically controlled. The left and right
vane heating elements are controlled by the re-
spective PITOT/VANE HEAT L or R switch.
Vane heater failure is indicated by illumina-
tion of the L (or R) VANE HTR FAIL and ICE
PROT
↑
annunciators.
WARNING
Left Pitot Heat Failed Right Pitot Heat Failed
Air Data Computer No. 1 Air Data Computer No. 2
Standby Airspeed
Indicator
Stall Detector Channel 3
Additional special-order
equipment, if connected