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PICCOLO
DUCT
TELESCOPIC
DUCT TELESCOPIC
DUCT
LOW
PRESSURE
PORTS
HIGH
PRESSURE
PORTS
COWL
ANTI--ICE
VALVE
WING
ANTI--ICE
VALVE
HP GROUND
AIR SUPPLY
SWITCHING
CHAN
A
CHAN
B
TO EICAS
AILC
INBD TEMP
SENSOR
WING
Vol. 1 15--30--3
ICE AND RAIN PROTECTION SYSTEM
Wing Anti--Ice System Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
Wing Anti---Ice Controls
Figure 15---30---2
WING
Used to control wing
anti--ice systems.
Anti--Ice Panel
Overhead Panel
Bleed Air Panel
Overhead Panel
Vol. 1 15--30--4
ICE AND RAIN PROTECTION SYSTEM
Wing Anti--Ice System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Anti---Ice Synoptic Page
Figure 15---30---3
OVHT (red)
Indicates that an overheat condition
has been detected in the respective
anti--ice system.
WING A/ICE SNSR (amber)
Indicates failure of both channels of left or
right outboard wing temperature sensors
with wing anti--ice selected on.
Wing Cross--Bleed Valve
Position Indicator
open (white)
closed (white)
failed to attain commanded
position (half--intensity magenta)
In case of an AILC Channel B failure, as
indicated by a WING A/I FAULT status
(white) message, the wing cross--bleed
valve open position on the A/ICE synoptic
page will not be available.
Anti--Ice Page
NOTE
BRT
PENDING RECTIFICATION
NOTE
During Wing A/I Cross Bleed
operations, both wings flow lines
can be displayed amber with a
L or R WING A/I caution message.
Vol. 1 15--30--5
ICE AND RAIN PROTECTION SYSTEM
Wing Anti--Ice System Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
Wing Anti---Ice System EICAS Indications <1001>
Figure 15---30---4
L or R COWL A/I OPEN caution (amber)
Indicates that respective cowl anti--ice valve
failed to close when selected off.
L or R COWL A/I caution (amber)
Indicates that the respective cowl
anti--icevalve failed to open when
selected on or valve position can not
be determined.
L or R COWL A/I DUCT status (white)
Indicates that respective cowl duct pressure
is less than 3.12 psig or greater than 53.1 psig
with battery bus powered.
COWL A/I ON advisory (green)
Indicates that both left and right cowl
anti--ice valves are open when selected on.
WING/COWL A/I ON advisory (green)
Indicates that both wing and cowl anti--ice
systems are on and operating normally.
L or R COWL A/I ON advisory (green)
Indicates only the left or the right cowl anti--ice
valve is open when both are selected on.
L or R ENG TAT HEAT caution (amber)
Indicates that the respective T2 heater
has failed.
Primary Page
Status Page
Vol. 1 15--30--6
ICE AND RAIN PROTECTION SYSTEM
Wing Anti--Ice System Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Isolation Valve WING A/ICE
ISOL
BATTERY
BUS 2 N5
Wing Anti-Ice
Controller
A/ICE CONT
CH A DC BUS 1 1 D7
A/ICE CONT
CH B
DC
ESSENTIAL 2 T1
Vol. 1 15--40--1
ICE AND RAIN PROTECTION SYSTEM
Engine Cowl Anti--Ice System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
1. ENGINE COWL ANTI--ICE SYSTEM
The engine cowl anti-ice system is used to prevent ice formation on the engine intake
leading edges. This is done by using hot engine bleed air to heat the leading edge surface.
The hot bleed air is supplied to the intake leading edges through respective L/R cowl
anti--ice shutoff valves. Bleed air is distributed through insulated ducting and an air mixing
tube before entering a double walled duct in the engine cowl leading edge. The inner
portion of the duct carries the bleed air. In the event of a rupture of the inner wall, a bleed
leak detector transducer mounted in the outer wall supplies a bleed leak signal to the EICAS
to illuminate the L/R COWL A/I DUCT warning message.
The left and right cowl anti-ice shutoff valves are manually controlled by respective LH and
RH COWL switches on the ANTI--ICE control panel. Crew activation of each system, opens
the respective engine cowl anti-ice shutoff valve. The shutoff valves are electrically
controlled and pneumatically operated. Valve status is displayed on the EICAS, ANTI--ICE
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