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CSP A--013
Wing Anti---Ice EICAS Messages <MST>
Figure 15---30---3
WING A/ICE OK advisory (green)
Comes on to indicate sufficient heat available
for use of anti--ice and both overheat detectors
are operational.
WING A/ICE ON advisory (green)
Comes on to indicate that the wing anti--ice
system has been selected on and is operating
normally.
ANTI--ICE DUCT warning (red)
Comes on when bleed air leak is
detected in left and/or right fuselage
or wing anti--ice ducts. Accompanied
by voice alert:
Status Page
<0039>
<0039>
WING OVHT warning (red)
Comes on when overheat
condition exists in wing leading
edge. Accompanied by voice alert:
Primary Page
<0006>
14 TH ARM CLSD (L, R) status (white)
Comes on to indicate that the applicable 14th
stage bleed air switch is selected closed but
the SOV is open.
DUCT MON LOOP A, B status (white)
Comes on to indicate that corresponding
loop is under test.
14 TH ISOL OPEN status (white)
Comes on when the 14th stage bleed air
isolation valve is open.
WING / COWL A/I ON advisory (green)
Comes on to indicate that the wing and
cowl anti--ice systems have been selected
on and are operating normally.
DUCT TEST O.K. advisory (green)
Comes on to indicate that corresponding
loop test is successful.
WING
OVERHEAT
ANTI--ICE
DUCT
WING OVHT
ANTI--ICE DUCT
L WING A/ICE
R WING A/ICE
WING A/ICE SNSR
<0039>
<0039>
<0039>
WING A/ICE OK
DUCT TEST OK
WING A/ICE ON
WING/COWL A/I ON
14TH ISOL OPEN
DUCT MON LOOP
14TH ARM CLSD L
14TH ARM CLSD R
<0039>
WING A/ICE SNSR caution (amber)
Comes on to indicate that a fault is detected
in the wing anti--ice sensor.
L/R WING A/ICE caution (amber)
Comes on when failure is detected in wing
anti--ice system (left or right).
Vol. 1 15--30--5
REV 56, Jan 31/03
ICE AND RAIN PROTECTION SYSTEM
Wing Anti--Ice System
Flight Crew Operating Manual
CSP A--013
MASTER
Wing Anti---Ice Synoptic Page Indications <MST>
Figure 15---30---4
Wing Anti--Ice Flow Line
(green)
Comes on (with applicable
EICAS advisory message)
to indicate that wing
anti--ice system has been
selected on and is
operating normally.
Left Wing Anti--Icing Valve
Anti--Ice Page
Right 14th Stage
Shutoff Valve
Right Wing Anti--Icing
Valve
14th Stage Isolation
Valve
OVHT warning (red)
Comes on to indicate
overheat condition in
respective wing anti--ice
system.
WING A/ICE OK Message (green)
Successful test of wing anti--ice system.
Left 14th Stage Shutoff
Valve
Valve Position Indicator
Indicates open
or
Indicates invalid data
(no tube)
or
Indicates closed
or
WING A/ICE SNSR
Comes on to indicate
wing anti--ice sensor
failure.
<0039>
REV 56, Jan 31/03
Vol. 1 15--30--6
ICE AND RAIN PROTECTION SYSTEM
Wing Anti--Ice System
Flight Crew Operating Manual MASTER
CSP A--013
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
MAN 1 DC ESS 4 B4
Anti--ice
MAN 2 DC BAT 2 N5
Wi d
Anti Controller A/ICE AUTO 1 DC BUS 1 1 G2
Wing and A/ICE AUTO 2 DC BUS 2 2 G2
Cowl Anti-Ice 14th St
B/AIR ISOL
DC BUS 1 1
F9
Stage
Bleed Air
B/AIR ISOL L
F10
B/AIR ISOL R DC BUS 2 2 F10
Vol. 1 15--40--1
REV 56, Jan 31/03
ICE AND RAIN PROTECTION SYSTEM
Engine Cowl Anti--Ice System
Flight Crew Operating Manual
CSP A--013
MASTER
1. ENGINE COWL ANTI--ICE SYSTEM
The engine cowl anti-ice system prevents ice formation on the engine intake leading edges
and the engine T2 sensors by heating the surfaces with hot 14th stage engine bleed air.
The hot bleed air is supplied to the intake leading edges through respective L/R cowl
anti--ice valves. (Refer to figure 1, section 30 of this chapter)
The left and right cowl anti-ice pressure regulating and shutoff valves are manually
controlled by the respective LH and RH COWL switches on the ANTI--ICE control panel.
The valves are electrically controlled and pneumatically operated and are failed--safe to the
open position. When power is applied to the aircraft, the valves go to close. Crew activation
of each system, opens the respective cowl anti-ice valve.
　
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