Flight Deck Window Heating
The flight deck anti-icing system uses electrical power to give heat to the flight compartment windows and prevent ice forming – the heat also improves durability in the event of an impact (such as a bird strike for example)
The flight deck windows are numbered 1,2 and 3 LH and RH – the number 1 is the most forward and the number 3 is the most aft.
The window heat control units (WHCUs) are part of the control cabin window anti-icing system and as such monitor window temperatures and control power output to the windows.
Thermal switches monitor window temperature and control power to the left and right window 3 and are not controlled in the same way as windows 1 and 2.
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