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REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
WINDSHIELD/WINDOW ANTI-ICE SYSTEM (CONT'D)
Windshield/Window Anti-Ice System
Figure 14−10−4
Components and Operation
Windshield and Window Construction
The forward-facing windshields and side windows are constructed of two vinyl layers, separated
by a vinyl inner layer. Each windshield and window incorporates electrical resistance coatings
that provide heat for anti-icing the windshields, and low heat for defogging the side windows.
Temperature sensors and temperature controllers for each windshield and window regulate
system temperature to maintain a scheduled surface temperature.
Control Switches and Function
The L and R WSHLD/WIND switches, located on the ANTI-ICE panel, control the
windshield/window anti-ice system. The L WSHLD/WIND switch controls the left windshield and
window. The R WSHLD/WIND switch controls the right windshield and window.
When the WSHLD/WIND switch is set to LOW, the corresponding windshield and side window
will be controlled at the low heat level (41°C/106°F).
When the WSHLD/WIND switch is set to HI, the controllers and sensors operate to maintain a
high heat level (58°C/137°F) on the corresponding windshield, and a low heat level
(41°C/106°F) on the corresponding side window.
ICE AND RAIN PROTECTION
Description
Vol. 2 14−10−7
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
WINDSHIELD/WINDOW ANTI-ICE SYSTEM (CONT'D)
Overheat protection circuits for each windshield or window remove power from the affected
surface during an overheat condition. The applicable L (R) WSHLD HEAT, L (R) WINDOW HEAT
caution EICAS message will also be displayed. Moving the WSHLD/WIND switch to the
OFF/RESET position de-energizes the applicable windshield and window, and resets the
temperature controller.
System Test
The TEST switch is used to test the windshield and window anti-ice systems. With both
WSHLD/WIND switches in the HI position, depressing the TEST switch performs a test of the
windshield and window heat systems. A successful test is indicated by the L (R) WSHLD HEAT
OK and L (R) WINDOW HEAT OK advisory EICAS messages appearing.
With the WSHLD/WIND switches in the LOW position, only the side window heat system will be
tested.
AIR DATA PROBES AND SENSORS ANTI-ICING
Description
The air data probes and sensors are located on either side of the aircraft nose, and are electrically
heated to prevent ice formation. Two air data sensor heat controllers (ADSHCs) provide control
and monitoring of the probe heaters.
Two probe toggle switches located on the ANTI-ICE panel provide control of AC power to the left
side and right side heating elements. Activation of the heating elements is determined by probe
switch positions, engine generator operation, and passenger door status.
ICE AND RAIN PROTECTION
Description
Vol. 2 14−10−8
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AIR DATA PROBES AND SENSORS ANTI-ICING (CONT'D)
Air Data Probes and Sensors Anti-Icing System
Figure 14−10−5
Components and Operation
Primary Pitot-Static Probes
There are two pitot-static masts, one on either side of the nose. The pitot-static mast consists of
a head and mounting base. The mast has two heaters, one in the head and the other in the
base.
Standby Pitot Probe
There is one standby pitot probe on the left side of the nose, which contains one integral heating
element.
Alternate Static Ports
Two flush alternate static ports are located on each side of the aircraft, and each contains an
integral heating element.
ICE AND RAIN PROTECTION
Description
Vol. 2 14−10−9
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AIR DATA PROBES AND SENSORS ANTI-ICING (CONT'D)
Angle-of-Attack (AOA) Vanes
Two angle-of-attack vanes are located on each side of the aircraft, and each contains an
integral heating element in the vane.
Auxiliary Angle-of-Attack Vane
One auxiliary angle-of-attack vane is located on the right side of the nose, and contains two
integral heating elements, one for the vane and the other for the base.
Total Air Temperature (TAT) Probe
One total air temperature sensor is located on the right of the aircraft, and contains an integral
heating element.
Air Data Sensor Heat Controllers (ADSHCs)
The ADSHCs provide control of AC power to respective heating elements, and also detect
system failures. Should any ADSHC lose control power, all probes connected to the failed
　
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