737 Flight Crew Operations Manual
Anti-Ice, Rain -
System Description
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
3.20.2 D6-27370-866-EGP
A conductive coating on the outer glass pane of window numbers 1 and 2 permits
electrical heating to prevent ice build–up and fogging. A conductive coating on
the inner glass pane of window number 3 permits electrical heating to prevent
fogging.
Flight Deck Window Heat Operation
The FWD WINDOW HEAT switches control heat to window number 1. The
SIDE WINDOW HEAT switches control heat to window numbers 2 and 3.
Temperature controllers maintain windows numbers 1 and 2 at the correct
temperature to ensure maximum strength of the windows in the event of bird
impact. Power to window numbers 1 and 2 is automatically removed if an
overheat condition is detected. Thermal switches, located on window number 3,
open and close to maintain the correct temperature of window 3.
September 26, 2013
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