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Window Heat
On each side of the flight deck, electrical heating is used to demist the 2 side windows and anti-ice the windshield. The windshield heating operates at low power on the ground and normal power in-flight. One WHC on each side regulates the system.
Window heating comes on when:
- automatically, with 1 engine running or in-flight
- manually, with PROBE/WINDOW HEAT pushbutton switches ON