The system is activated using a switch in the cockpit. This turns on the fluid pump, which pumps fluid out of the reservoir, through the ducting and out onto the calibrated orifices on the wing leading edge. As the fluid flows along the airstream (both on the top and bottom surfaces of the wing), a thin coat of fluid is left that protects the surface from icing. The excess fluid then leaves the wing surface and slides out behind the wing's trailing edge.
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