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EICAS Messages - Wing Anti-Ice System .......................................................... 14-14
EICAS Messages - Engine Cowl Anti-Ice System .............................................. 14-14
EICAS Messages - Windshield/Window Anti-Ice System................................... 14-15
EICAS Messages - Air Data Probes and Sensors Anti-Icing .............................. 14-15
EICAS Messages - Ice Detection System........................................................... 14-15
List of Figures
Graphic Title Figure
For Training Purposes Only
May 03
14-iii
P I LOT T R A I N I N G GU I D E ICE AND RAIN PROTECTION
Wing Anti-Ice System........................................................................................................14-1
Wing Anti-Ice Components ...............................................................................................14-2
Cowl Anti-Ice System........................................................................................................14-3
Windshield/Window Anti-Ice System ................................................................................14-4
Air Data Probes and Sensors Anti-Icing System ..............................................................14-5
Ice Detectors.....................................................................................................................14-6
ANTI-ICE Panel ................................................................................................................14-7
14-iv For Training Purposes Only
May 03
ICE AND RAIN PROTECTION P I LOT T R A I N I N G GU I D E
Page Intentionally Left Blank
ICE AND RAIN PROTECTION
For Training Purposes Only
May 03
14-1
P I LOT T R A I N I N G GU I D E
CHAPTER 14: ICE AND RAIN PROTECTION Introduction
There are four anti-iced areas on the Challenger 604:
• wing leading edges
• engine cowls
• windshields and windows, and
• air data probes
The wing leading edges and the engine intake cowls are anti-iced using engine 14thstage
bleed air. The windshields, windows and air data probes are anti-iced using
electrical power. An ice detector system provides EICAS indications of ice
accumulation.
Anti-icing of the aircraft tail surfaces is not required.
ICE AND RAIN PROTECTION
14-2 For Training Purposes Only
Jan 04
P I LOT T R A I N I N G GU I D E
Wing Anti-Ice System
Description
The left and right wing leading edges are anti-iced using pressure-regulated 14th-stage
bleed air, distributed by wing anti-ice ducting and piccolo tubes. The system is
controlled by the WING ANTI-ICE switch located on the ANTI-ICE panel. The
WING ANTI-ICE switch normally controls the left and right wing anti-ice valves via
wing-mounted control sensors and the wing anti-ice controller. An isolation valve
allows both wings to be anti-iced from a single bleed source via a crossover duct.
Panel lights and EICAS messages provide indications of system status during
operation.
Wing Anti-Ice System
Figure 14-1
14TH STAGE
DUCT
FAIL
CLOSED
OPEN
DUCT
FAIL
CLOSED
BLEED AIR
L ISOL R
L
Wing
A/Ice
Valve
R
Wing
A/Ice
Valve
L
14th
SOV
R
14th
SOV
Stby Thermal Switch
Control Sensor
Overheat Sensor
L Cowl
A/Ice
R Cowl
A/Ice
14th-Stage
Bleed Air Port
14th-Stage
Bleed Air Port
WING
ANTI-ICE
CONTROLLER
14th Isol
P604_14_002
BLEED AIR PANEL
R T/R
PDU
L T/R
PDU
ICE AND RAIN PROTECTION
For Training Purposes Only
Sept 04
14-3
P I LOT T R A I N I N G GU I D E
Components and Operation
Anti-Ice Ducts
Bleed air taken from the 14th-stage bleed air manifold is ducted to the wing and
ejected from piccolo tubes onto the inner surfaces of the leading edge. After heating
the leading edges, the air is exhausted overboard through louvers located beneath each
wing leading edge. The piccolo tubes extend the full length of the leading edges.
Wing Anti-Ice Components
Figure 14-2
Wing Anti-Ice Valves
The left and right wing anti-ice valves are electrically controlled, pneumatically
operated, pressure-regulating shutoff valves. The valves are spring-loaded to the
closed position when no 14th-stage pressure is available or electrical control power is
lost. The wing anti-ice system is normally operated in the NORM mode. A backup
mode (STBY mode) exists should NORM mode fail.
Wing Anti-Ice Controller
The wing anti-ice controller maintains the temperature of the left and right wing
　
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