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serviceable control sensor on the opposite side, will control the WAIVs.
ICE AND RAIN PROTECTION
Flight Crew Operating Manual Rev 3, Apr 25, 2005
CSP 700−5000−6
Volume 2
14−10−8
WAI OPERATION
The ice detectors will send a signal to the BMC to activate the wing antiice
system when selected to
AUTO. Wing antiice
can be manually selected to ON, in which case the WAIVs will open,
independent of the ice detection system. Whenever wing antiice
is activated (AUTO or ON), a WAI
icon will be displayed on the EICAS page. The ICON colour will vary from amber, green or white,
depending on the temperature in the wing and/or its status.
GF1410_016
LP
HP
L R
APU
HP
LP
COND
AIR
BLEED/ANTIICE
WING A/ICE AUTO
789 789
N1
ITT
WAI WAI
40
PSI
WING A/ICE ON
AUTO
OFF ON
WING
WING
AUTO
OFF ON
40
PSI
Crossbleed Valve (CBW)
The left and right hand antiice
systems normally operate independently from one another. In the
event of a single engine failure, bleed failure or a failure of wing antiice
air supply on one side, the
left and right systems are interconnected by a CBW. This allows both wings to be fed from a single
engine. In case of a failure in AUTO operation, the CBW will automatically open and the affected
WAIV will automatically be closed by the BMC. Manual operation of the CBW is provided on the
ANTIICE
panel.
73.3 73.3
789 789
N1
ITT
WAI WAI
GF1410_017a
LP
HP
L R
APU
HP
LP
COND
AIR
BLEED/ANTIICE
0
PSI
WING XBLEED FROM R
40
PSI
WING A/ICE AUTO
OR
AUTO
OFF ON
WING XBLEED
AUTO
WING XBLEED
OFF ON
ICE AND RAIN PROTECTION
Rev 3, Apr 25, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
14−10−9
WAI FAILURE INDICATIONS
The WAI failure indications are as follows:
Wing AntiIce
Overheat
If there is an overheat in the wing antiice
system, a message is displayed on EICAS.
Turn WING ANTIICE
OFF
789 789
N1
ITT
WAI WAI
GF1410_018a
BLEED/ANTIICE
WING A/ICE OVHT
AUTO
OFF ON
WING
AUTO
OFF ON
WING
Wing AntiIce
Fail
If wing antiice
is failed, a message is displayed on EICAS. If ice is detected during this failure
condition, the stall warning trigger points are advanced automatically. Ensure rpm (N2) is above
76% may make this amber message diappear.
NOTE
If ice is detected, the stall warning trigger points are advanced automatically.
For more information on stall protection, see Chapter 10, FLIGHT CONTROLS.
GF1410_019
ICE
L−R WING A/ICE FAIL
STALL WARN ADVANCE
ICE AND RAIN PROTECTION
Flight Crew Operating Manual Rev 3, Apr 25, 2005
CSP 700−5000−6
Volume 2
14−10−10
WAI FAILURE INDICATIONS (CONT'D)
Wing AntiIce
Low Heat
If there is insufficient heat in the wing leading edge duct, a message is displayed on EICAS.
789 789
N1
ITT
WAI WAI
GF1410_020
AIR
BLEED/ANTIICE
ICE
WING A/ICE LO HEAT
ICE AND RAIN PROTECTION
Rev 3, Apr 25, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
14−10−11
SLAT ANTI-ICING
The sections of slat leading edge that are heated, are as follows:
· Inboard fixed leading edge.
· Slat 1, 2, 3 and 4.
Only the short, fixed section outboard of slat 4 and the leading edge of the winglet are not heated.
SLAT ANTI-ICE OPERATION
Air is ducted into the fixed section of the wing leading edge from the forward part of the wing root.
From there, it is directed into the wing leading edge slats via a telescopic duct which extends as the
slats move to the extend position. Piccolo tubes in both inboard fixed leading edge and outboard at
each slat, distribute the air into the inside surface of the wing leading edge for ice protection. Air is
then extracted overboard between the slat and main wing.
TEMPERATURE
SENSOR
FIXED LEADING
EDGE
WING CROSSBLEED
VALVE
WING ANTIICE
VALVES (WAIV)
SLAT
EXTENDED
PICCOLO
TUBE
TELESCOPIC
JOINT
GF1410_021
ICE AND RAIN PROTECTION
Flight Crew Operating Manual Rev 3, Apr 25, 2005
CSP 700−5000−6
Volume 2
14−10−12
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