737 Flight Crew Operations Manual
Anti-Ice, Rain -
Controls and Indicators
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
3.10.6 D6-27370-866-EGP
2 WING ANTI–ICE Switch
OFF – wing anti–ice control valves are closed.
ON (in the air) –
• wing anti–ice control valves are open
• stick shaker logic is set for icing conditions.
Note: Stick shaker logic remains set for icing conditions for the remainder
of the flight, regardless of subsequent WING ANTI–ICE switch
position.
ON (on the ground) –
• wing anti–ice control valves open if thrust on both engines is below
takeoff warning setting and temperature inside both distribution ducts is
below thermal switch activation temperature
• control valves close if either engine thrust is above takeoff warning
setting or thermal switch is activated in either distribution duct. Switch
remains ON
• switch trips OFF at lift–off.
March 31, 2016
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