Ice and Rain Protection Flashcards
The Ice and Rain Protection System provides pneumatic anti-ice protection for the
engine cowls and wing slats.
The ice and rain protection system includes:
(1) Wing anti-ice system.
(2) Engine anti-ice system.
(3) Windshield heating system.
(4) ice detectors
(5) Air Data Smart Probe (ADSP)/TAT heating system.
(6) Windshield wiper system.
WINDSHIELD HEATING BUTTON
PUSH IN: activates the associated windshield heating system.
PUSH OUT: deactivates the associated windshield heating system.
…
WING ICE PROTECTION BUTTON
PUSH IN: automatic operation of the wing anti-ice system.
PUSH OUT: deactivates the wing anti-ice system.
…
ENGINE ICE PROTECTION BUTTON
PUSH IN: automatic operation of the associated engine anti-ice
system.
PUSH OUT: deactivates the associated engine anti-ice system.
…
ICE PROTECTION MODE SELECTOR KNOB
AUTO: automatic operation of the wing and engine anti-ice systems.
ON: overrides the system logic inflight, activating the anti-ice system regardless of icing condition. It also
activates the anti-ice on ground according to the
system logic.
…
HEATER BUTTON
PUSH IN: activates the ADS probes heater. A striped bar illuminates in the button.
PUSH OUT: the ADS probes heater operates in AUTO mode
…
WINDSHIELD WIPER SELECTOR KNOB
TIMER: eight-second intermittent operation.
OFF: stops windshield wipers in the stowed position.
LOW: windshield wipers operate at low speed.
HIGH: windshield wipers operate at high speed
…
The engines cowls are heated with air from the _____, extracted from the respective engine.
high stage bleed (10th Stage)
The engine bleed valve is _____ if either the electrical or pressure signal are not present.
fail safe open
WING ICE PROTECTION
All three (2,3,4) outboard leading edges are heated by bleed air extracted from the ____. Each engine provides bleed air for the respective wing anti-ice.
The APU is not capable of supplying bleed air for the anti-ice operation.
engines.
WING ICE PROTECTION
If one bleed air fails, the anti-ice system automatically opens the ______ and uses the opposite bleed for both wings anti-ice
cross bleed valve
Ice Detectors
(1) Normal Operation
(a) The airplane is equipped with two ice detectors installed on the left and right side of the nose section.
(b) If an icing condition is detected during flight, the ice detectors command the wing and engine anti-ice valves to open and remain activated for ___ minutes after the icing condition is no longer detected
5
REF A/I Modes of Operation
(a) The REF A/I mode of operation can be selected on ground using the OAT/visible moisture table presented in ICING CONDITIONS, COLD WEATHER AND COLD SOAK OPERATIONS supplementary procedure, in block 3-75.
(b) The MCDU setting operates the anti-ice system and inhibits the ice detectors activation logic during takeoff until _____ min after liftoff, whichever occur first. The settings actuate as described below:
OFF – The anti-ice valves will be inhibited closed until the end of takeoff phase, considered in the logic as _______ after liftoff. After that, the engine and wing anti-ice valves will open if ice is detected.
ENG – Only the ______ will be kept open after engine start. The wing anti-ice valves remains inhibited closed. The EICAS status message ENG TDS REF A-I ENG will be displayed to confirm the MCDU selection.
ALL – The engine anti-ice valves are commanded open after completion of engine start and the wing anti-ice valves are commanded open with wheel speed above ____. The EICAS status message ENG TDS REF A-I ALL will be displayed to confirm the MCDU
1700 ft AGL or 2
1700 ft AGL or 2 min
engine anti-ice valve
40 kt
After takeoff, the settings in the MCDU will be ignored by the airplane and the engine and wing anti-ice valves will open anytime an icing condition is detected, or the Ice Protection Panel Mode Switch is set to ON position
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