14. ANTI ICE Panel (Ice And Rain Protection) Flashcards
What is accomplished if the WING anti ice pushbutton is selected ON while the aircraft is on the ground?
The system will self-test for 30 seconds, and then the valves will close until the aircraft is airborne.
What does the WING FAULT light illumination on the ANTI ICE panel indicate?
• Valve disagreement (comes on momentarily when valve in transit)
• Low pressure
What does the ENG 1(2) FAULT light illumination on the ANTI ICE panel indicate?
Valve disagreement (comes on momentarily when valve in transit
After selecting the probe/window heat pb on the ground to remove ice or fog on the window. Would the pilot need to select it off before T/O?
Yes, so it can operate in the automatic mode
What part of the wing is heated?
Outboard 3 Slats
In what position do the WING and ENGINE anti ice valves fail if electrical power is lost?
• Wing – valves CLOSE
• Engine – valves OPEN
What is the significance of high swept wings versus less swept wings in ice accumulation?
The more swept the wing, the less time for the moisture to attach.
A flight crew is arriving to the aircraft in DTW early in the morning and notice that cockpit windows are frosted over. What should the flight crew do?
Select the PROBE/WINDOW HEAT on. This must be selected off prior to takeoff in order to regain normal system logic.
The temperature outside is 2°C with visible moisture. What should the flight crew turn on?
ENG anti ice after engine start
After takeoff, when should the flight crew turn on the WING anti ice?
WING anti ice can be used after the aircraft is in a clean wing and when conditions warrant its use.
Climbing through FL240 in visible moisture, the crew notices the TAT is 22°C and the SAT is -45°C. What would be appropriate use of the ENG anti ice?
Engine anti ice may be turned OFF in this scenario. Engine anti ice is required when icing conditions exist or are expected except during climb or cruise when the SAT is below -40°C.
Starting a descent out of FL350 with visible moisture, the TAT is -32°C and SAT is -53°C, what would be appropriate use of the ENG anti ice?
Engine anti-ice must be ON during the descent in icing conditions even if SAT is below -40°C.
Descending through 10,000ft, the pilots notice ice accumulation on the cockpit windshield blades. What should they do?
Turn on the WING anti ice. WING anti ice may either be used to prevent or remove ice accumulation from the wing leading edges. After takeoff, WING anti ice can be used after the aircraft is in a clean wing configuration. Ice accumulation can be detected by observing the ice indicator located between the two cockpit windshields or by observing the windshield wipers blades.
Can the WING anti ice be used on the approach and landing?
Yes, but it should only be considered in severe icing because second segment climb performance could be affected if a go-around is performed.
What is TAT?
Total Air Temperature is also called Indicated Air Temperature (IAT) or Ram Air Temperature (RAT)