Boeing 747 Anti-Ice Systems Questions with Correct Answers
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Boeing 747 Anti-Ice Systems
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Boeing 747 Anti-Ice Systems
Boeing 747 Anti-Ice Systems
How many anti-ice systems does the B-737 have? (2 total) - Answer- Bleed air and electrical
Name everything that is electrically anti-iced on the B-737? - Answer- Pitot Tubes, Temp. Probes, Alpha vane Anti-Ice system, Windows - Windshield - doors, Water and Toilet ...
Boeing 747 Anti-Ice Systems
How many anti-ice systems does the B-737 have? (2 total) - Answer- Bleed air and
electrical
Name everything that is electrically anti-iced on the B-737? - Answer- Pitot Tubes,
Temp. Probes, Alpha vane Anti-Ice system, Windows - Windshield - doors, Water
and Toilet drain Anti-Ice system
Can the B-373 be dispatched into known or forecast icing conditions? - Answer- Yes,
but only into light or moderate icing if dispatcher and pilot agree is is safe, but never
severe icing.
Name everything which is pneumatically (hot bleed air) anti-iced on the B-737? -
Answer- Engine 1, and 2 -engine cowlings, nose dome bullet, and inlet guide vanes-
and the Wing Thermal Anti-Icing system (WTAI).
Which engines provide hot bleed air to the wing anti-ice system on the B-737? -
Answer- Engines 1 and 2
When do icing conditions exist on the ground according to Boeing? - Answer- When
the temperature is 50F and below and there is visible moisture.
When do icing conditions exist in-flight according to Boeing? - Answer- When the
temperature is 10C and below and there is visible moisture.
With engine anti-ice on for takeoff, is there a takeoff weight penalty with the B-737? -
Answer- Yes, performance decreases with engine anti-ice on.
Why are the antennas anti-iced on the B-737? - Answer- To prevent ice from building
up and breaking off, this could fly back into the engines or damage the fuselage or
any control surfaces.
Which part of the wing is anti-ice ever used for takeoff on the B-737 - Answer- Only
around the leading edge devices (LEDs)
Is wing anti-ice ever used or takeoff on the B-737? - Answer- No, it automatically
shuts off if take-off power is detected.
Is engine anti-ice ever turned on for takeoff on the B-737? - Answer- Yes, when icing
conditions exist for takeoff, it must be on. (Remember, there is a takeoff weight
penalty with this.)
What is the major function of windshield heat? - Answer- Bird strike protection
How does windshield heat work? - Answer- When the windshield is heated it
becomes pliable, so if a bird hits it the glass will not shatter.
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