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angle of attack (AOA) vane and left static port. Controller 2 monitors the right pitot, right
AOA vane, total air temperature (TAT) probe and right static port. Controller 3 monitors the
standby pitot probe. The ADSHC’s electronically control the heating elements to prevent ice
formation that may cause erroneous air data information. The air data sensor heating
system is activated automatically on the ground and in flight.
The ground mode has two operational heating modes, automatic and manual When either
engine generator is on and the LH and RH PROBES switches, on the ANTI--ICE control
panel, are OFF, the LH and RH pitot probes and the standby pitot probe are heated at half
power (The APU does not control this function). The static ports, base heaters, TAT probe,
and the AOA vanes are not powered automatically in the ground mode. However, they can
be heated by selecting the LH and RH PROBES switches to ON.
NOTE
During ground operations, when AC power is on--line
and the air--bridge is being used, the probes will be
powered and the ground crew should be advised of
the hazard areas.
In the flight mode, the automatic control function is completely independent of the control
switches. The controllers automatically supply full power to all the air data probes and
sensors, regardless of PROBES switch position.
NOTE
Following an ADG deployment, if the power
interruption lasts longer than 5 seconds, the PITOT
BASE HEAT caution message will remain latched.
After landing, the heater ADS CONT 1 circuit breaker
(CB4--A7) may be pulled and reset to remove the
caution message.
Effectivity:
S Airplanes 7003 to 7189 incorporating SB 601R--24--082 and aircraft 7190 and subsequent.
NOTE
After engine start,with the engine generators off, the L,
R and STBY PITOT HEAT cautionmessages will remain
displayed until an engine generator is brought on line.
REV 56, Jan 31/03
Vol. 1 15--50--2
ICE AND RAIN PROTECTION SYSTEM
Air Data Sensor Anti--Ice System
Flight Crew Operating Manual MASTER
CSP A--013
Air Data Anti---Ice System and Control
Figure 15---50---1
RIGHT PITOT--
STATIC HEAD
HEATER
RIGHT PITOT--
STATIC PROBE
RIGHT PITOT--
STATIC BASE
HEATER
TOTAL AIR
TEMP PROBE
RIGHT ANGLE OF
ATTACK VANE
RIGHT STATIC
PORT
LEFT PITOT--
STATIC HEAD
HEATER
LEFT PITOT--
STATIC PROBE
LEFT PITOT--
STATIC BASE
HEATER
STANDBY
PITOT PROBE
LEFT ANGLE OF
ATTACK VANE
LEFT STATIC
PORT
Anti--Ice Panel
EICAS
PROBES, Anti--Ice LH/RH Switches
Ground Operations:
OFF -- All probe heaters are off,
when there is no AC power on--line
or when the APU GEN is on.
ON -- With AC power on--line, probe
heat is as follows:
TAT -- OFF,
Static and AOA -- ON, and
Pitot and Base -- Half power heat.
ON -- With external power connected
(no generators on--line), probe heat
is as follows:
TAT -- OFF,
Static and AOA -- ON, and
Pitot and Base -- Half power heat.
ICE DET TEST Switch/Light
Used to test probe heater system.
Vol. 1 15--50--3
REV 56, Jan 31/03
ICE AND RAIN PROTECTION SYSTEM
Air Data Sensor Anti--Ice System
Flight Crew Operating Manual
CSP A--013
MASTER
Air Data Anti---Ice System and Control
Figure 15---50---1
RIGHT PITOT--
STATIC HEAD
HEATER
RIGHT PITOT--
STATIC PROBE
RIGHT PITOT--
STATIC BASE
HEATER
TOTAL AIR
TEMP PROBE
RIGHT ANGLE OF
ATTACK VANE
RIGHT STATIC
PORT
LEFT PITOT--
STATIC HEAD
HEATER
LEFT PITOT--
STATIC PROBE
LEFT PITOT--
STATIC BASE
HEATER
STANDBY
PITOT PROBE
LEFT ANGLE OF
ATTACK VANE
LEFT STATIC
PORT
Anti--Ice Panel
EICAS
PROBES, Anti--Ice LH/RH Switches
Ground Operations:
OFF -- All probe heaters are off,
when there is no AC power on--line.
ON -- With AC power on--line, probe
heat is as follows:
TAT -- OFF,
Static and AOA -- ON, and
Pitot and Base -- Half power heat.
ON -- With external power connected
(no generators on--line), probe heat
is as follows:
TAT -- OFF,
Static and AOA -- ON, and
Pitot and Base -- Half power heat.
ICE DET TEST Switch/Light
Used to test probe heater system.
REV 56, Jan 31/03
Vol. 1 15--50--4
ICE AND RAIN PROTECTION SYSTEM
Air Data Sensor Anti--Ice System
Flight Crew Operating Manual MASTER
CSP A--013
Air Data Anti---Ice EICAS Messages <MST>
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