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EV 2
ICE AND RAIN PROTECTION
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 14-01-05
WING ANTI-ICE SYSTEM (Cont)
WING ANTI-ICE SYSTEM SCHEMATIC
CFO1401002_006
T T
INSULATED
DUCTS PICCOLO
DUCTS
PICCOLO
DUCTS
WING
CROSS-BLEED
VALVE
WING
ANTI-ICE
INTEGRATED AIR
SYSTEM (IAS)
CONTROLLER NO. 2
INTEGRATED AIR
SYSTEM (IAS)
CONTROLLER NO. 1
T T T T
T T
TEMPERATURE
SENSOR (TYP)
COWL
ANTI-ICE
VALVE
HIGH
PRESSURE
VALVE
COWL
ANTI-ICE
VALVE
HIGH
PRESSURE
VALVE
DCU
EICAS
DISPLAY
STALL
PROTECTION
COMPUTER
CHANNEL
A
CHANNEL
B
VALVES
REV 1
ICE AND RAIN PROTECTION
Volume 2 Flight Crew Operating Manual May 06/2005
14-01-06 CSP 100-6 REV 2
ENGINE ANTI-ICE
DESCRIPTION
Each of the engine nacelle inlets are anti-iced with engine bleed-air. The left and right engine anti-icing systems are controlled
by L (R) ENG switches on the ANTI-ICE control panel located on the center pedestal.
COMPONENTS AND OPERATION
NACELLE ANTI-ICING VALVES
Nacelle anti-icing valves are located on top of each engine downstream of the high pressure duct. The valves are electrically
operated and pneumatically controlled and incorporates a fail safe open feature.
ENGINE NACELLE DUCTING
Hot bleed-air is directed to and then sprayed by a piccolo tube onto the inner surface of the nacelle leading edge. The air is
then discharged overboard through an exhaust duct located at the bottom of the nacelle inlet.
T2 SENSOR
A T2 sensor is installed in the inlet housing of each engine and senses the engine inlet total-air temperature. The T2 sensor
supplies the inlet total-air temperature to each of the electronic control units (ECU).
The in-control ECU uses the engine inlet total-air temperature for power control. The sensor contains two resistance temperature
devices and a heat device for anti-ice. The anti-ice function is controlled from the L or R ENG switches on the
ANTI-ICE panel.
ENGINE SPINNER
The engine spinner is a two-piece, aluminum forging with a conical shape to provide a surface that sheds ice in icing conditions
and operates without the need for anti-icing heat.
CFO1401002_010
MANIFOLD
PICCOLO TUBE
NACELLE
LEADING EDGE
NACELLE
ANTI-ICE
RING
T2 SENSOR
FAN
BLADES
SPINNER
EV 2
ICE AND RAIN PROTECTION
May 06/2005 Flight Crew Operating Manual Volume 2
REV 2 CSP 100-6 14-01-07
AIR DATA AND SENSORS ANTI-ICE
DESCRIPTION
The air data probes and sensors are located on either side of the aircraft nose and are electrically heated to prevent ice formation.
Separate air data sensor heat controllers provide control and monitoring of the probe heaters.
L (R) PROBES switches are provided on the ANTI-ICE control panel. When selected On, the following probes and sensors
are heated:
- Left and right standby static port
- Left and right AOA sensor
- Left and right pitot-static probe
- TAT probe
- Standby pitot probe
Failure of a probe heater will signal the DCU to display the appropriate EICAS message.
COMPONENTS AND OPERATION
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.
STANDBY STATIC PORTS
One flush standby static port located in each side of the aircraft.
ANGLE-OF-ATTACK VANES (AOA)
Angle-of-attack vanes are located on each side of the aircraft under the side windows and behind the pitot tubes. The AOA
vanes are heated when activated by the PROBES switch.
TOTAL AIR TEMPERATURE PROBE (TAT)
One total air temperature sensor is located in the right side of the aircraft. The TAT heater operates in flight only.
ICE AND RAIN PROTECTION
Volume 2 Flight Crew Operating Manual May 06/2005
14-01-08 CSP 100-6 REV 2
WINDSHIELD ICE AND RAIN PROTECTION
DESCRIPTION
The windshield and side window heating system includes two windshields and two side windows that contain embedded
heater elements and sensor elements. The windshield and windows are treated with a rain resistant coating
COMPONENTS AND OPERATION
WINDSHIELD AND SIDE WINDOW HEATING
The windshield heater elements are segmented into three sections, and allow for concentration of heating in a smaller area
of the windshield in order to allow visibility in severe icing conditions. The side window heater elements have no segmentation.
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