737 MAX Flight Crew Operations Manual
Anti-Ice, Rain -
System Description
3.20.2
MN-FLT-OH-201
Flight Deck Window Heat
Flight deck window numbers 1 and 2 consist of glass panes laminated to each side
of a vinyl core. Flight deck window number 3 consists of two acrylic panes
separated by an air space.
A conductive coating on the outer glass pane of window numbers 1 and 2 permits
electrical heating to prevent ice build–up and fogging. Window number 3 is not
electrically heated.
Flight Deck Window Heat Operation
The FWD WINDOW HEAT switches control heat to window No. 1. The SIDE
WINDOW HEAT switches control heat to window numbers 2.
Temperature controllers maintain window 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.
March 1, 2021
