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Ice Detection System
Flight Crew Operating Manual
CSP A--013
MASTER
1. ICE DETECTION SYSTEM
The aircraft is equipped with an ice detection system to alert the flight crew of impending
icing conditions. The ice detection system consists of two independent ice detector probes
located on each side of the forward fuselage and extending into the airstream. The ice
detection system operates continuously when AC power is available. During icing
conditions, each detector is electrically deiced (for 5 seconds every 60 seconds) to clear the
probe of ice build--up to allow continuous detection of ice formation.
The ice detectors interface with the data concentrator units (DCU) to provide visual
indications of icing conditions.
The ice detectors interface with the data concentrator units (DCU) to provide aural and
visual indications of icing conditions. <0022>
REV 56, Jan 31/03
Vol. 1 15--20--2
ICE AND RAIN PROTECTION SYSTEM
Ice Detection System
Flight Crew Operating Manual MASTER
CSP A--013
Ice Detection Functional Schematic <MST>
Figure 15---20---1
ICE SIGNAL
TEST
AC
ESS
BUS
AC
BUS 2
TEST
ICE SIGNAL
40 KHZ
heating
for 5
seconds
on 60
second
cycle.
40 KHZ
heating
for 5
seconds
on 60
second
cycle.
Self Self
ICE Detector Switch/light
ICE -- Lamp comes on amber to indicate
airplane entry into icing conditions with
both anti--icing systems not selected on.
(Both wing and cowl anti--ice must be on
to cancel alert.)
TEST -- When switch is pressed, system
is tested simulating an accumulation of
ice on the ice detectors. This test also
checks the probes heater system.
ICE Detector Switch/light
ICE -- Lamp comes on red to indicate
airplane entry into icing conditions with
both anti--icing systems not selected on.
(Both wing and cowl anti--ice must be on
to cancel alert.)
<0022>
Anti--Ice Panel
Overhead Panel
EICAS
Vol. 1 15--20--3
REV 56, Jan 31/03
ICE AND RAIN PROTECTION SYSTEM
Ice Detection System
Flight Crew Operating Manual
CSP A--013
MASTER
Ice --- EICAS Messages and Synoptic Page Indications <MST>
Figure 15---20---2 Sheet 1
ICE warning (red)
Comes on to indicate that ice has
been detected and wing/cowl are
not selected on. (Both wing and
cowl anti--ice must be on to cancel
alert.)
ICE status (white)
Comes on to indicate that ice has been
detected and the wing/cowl anti--ice
systems are on. Message will go off if
probe no longer detects ice during its
heating/detection cycle.
Status Page
<0039>
<0039>
ICE caution (amber)
Comes on to indicate that ice has been
detected and the wing/cowl anti--ice systems
are not on. (Both wing and cowl anti--ice must
be on to cancel alert.)
ICE DETECT FAIL caution (amber)
Comes on to indicate that both channels
of the ice detector unit are failed.
Primary Page
<0039>
ICE DET 1, 2 FAIL status (white)
Comes on to indicate failure of
corresponding ice detector unit.
<0006>
<0022>
ICE advisory (green)
Comes on to indicate that ice has been
detected and the wing/cowl anti--ice
systems are on. Message will go off if
probe no longer detects ice during its
heating/detection cycle.
ICE DET 1, 2 FAIL advisory (green)
Comes on to indicate failure of
corresponding ice detector unit.
<0039>
<0039>
ICE
REV 56, Jan 31/03
Vol. 1 15--20--4
ICE AND RAIN PROTECTION SYSTEM
Ice Detection System
Flight Crew Operating Manual MASTER
CSP A--013
Ice --- EICAS Messages and Synoptic Page Indications <MST>
Figure 15---20---2 Sheet 2
Anti--Ice Page
ICE DET 1, 2 FAIL status (white)
Comes on to indicate single failure of
corresponding ice detector unit.
ICE 1, 2 caution (amber)
Comes on to indicate that ice has been
detected (by respective detector) and that
wing/cowl anti--ice systems not selected on.
ICE 1, 2 status (white)
Comes on to indicate that ice has been
detected (by respective detector) and that
wing/cowl anti--ice systems are on.
ICE DET 1, 2 FAIL advisory (green)
Comes on to indicate single failure of
corresponding ice detector unit.
<0039>
ICE 1, 2 warning (red)
Comes on to indicate that ice has been
detected (by respective detector) and that
wing/cowl anti--ice systems not selected on.
　
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