Icing could compromise Pitot/static and stall warning
Icing could compromise Pitot/static and stall warning. Fast and thick ice buildup could fool the pilot by gumming up the pitot/static and stall indicators. The heating equipment could not keep up perhaps. If you also cannot see out the windows, had changes in airframe behavior because of ice buildup, and perhaps had thrust reduction, all at the same time, and maybe just put down the flaps....