Section III - Anti-Ice, Rain Flashcards
When both Engine Anti Ice valves are selected open, what indication will display on the EICAS below the N1 indication if any?
The engine thermal anti-ice (TAI) annunciation appears below the EICAS N1 indication when the engine anti-ice switch is on.
Where does the wing anti ice system supply bleed air? Does it supply bleed air to the horizontal or vertical stabilizer?
Wing anti-ice system provides bleed air to the three outboard leading edge slats on each wing. It does not supply air to the horizontal/vertical stabilizer
T/F: Both the Engine Anti Ice and Wing Anti Ice systems are inhibited on the ground.
FALSE
The engine anti ice system will operate normally on the ground. The wing anti Ice system can be operated in flight only.
What would cause a VALVE light to illuminate on an engine anti-ice switch?
The VALVE light illuminates if the wing anti ice valve disagrees with the switch position.
When do the Pitot, Standby Pitot, AOA, and TAT probes become heated?
Pitot and AOA probes, anytime an engine is running.
TAT probes are heated when airborne.
What scenario would cause a WINDOW HEAT EICAS message to display?
Two or more windows are not being heated
Under what conditions must engine anti-ice be selected to ON while on the
ground? In flight?
a. On the ground and Takeoff:
Temperature 10C OAT and below
Visible Moisture
Runway and/or taxiway contaminated with standing water, slush, or snow.
b. In flight (Climb and Cruise):
10C TAT to -40 SAT when visible moisture is present or anticipated.
c. Descent: from 10C TAT including SAT less than -40C, when visible moisture is present or anticipated.
d. Ice Crystals: Engine anti-ice must be ON when ice crystal icing exists, even when the temperature is below -40C SAT.
What is the significance of an INOP light when illuminated on a window heat switch?
The associated window is not being heated.
With respect to the flight deck windows, describe the type of protection provided for each window?
a. FWD Windows: Anti Ice, Anti Fog, Electrically Heated.
b. Side Windows: Anti Fog, Electrically Heated.
c. Aft Side Windows: Electrically heated
Describe a scenario that would prompt the necessity of a static engine run-up before takeoff.
When engine anti-ice is required and the OAT is 3 C or below, the takeoff must be preceded by a static engine run-up.
What are some considerations to account for during an engine start in cold weather?
Oil pressure can be slow to rise, initial oil pressure rise can be higher than normal, additional warm-up time can be needed to allow oil temperature to reach the normal range.
Where might a crew member look for indications of structural icing during flight?
Ice accumulation on the flight deck window frames, windshield center post, or windshield wiper arm, or side windows may be used as an indication of structural icing conditions and the need to turn on wing anti-ice.
T/F: Only rely on airframe visual icing cues or illumination of the ICING light before activating engine anti-ice
False: Do not rely on airframe visual icing cues or illumination of the ICING light. Instead use the temperature and visible moisture criteria because the late activation of engine anti-ice may allow excessive ingestion of ice and result in engine damage or failure.
