To quote IO540
" precipitation below 0C is freezing rain which is potentially quite nasty and I am not sure TKS would cope with it too well."
I dont know if that is strictly correct
precipitation can take many forms.It can be hail, rain, freezing rain, sleet or snow.
We had an event a couple years ago in a C404, Breacon northbound underneath the airway. Light icing was forcast that day with tops around 10000ft. The rime ice that developed in just a few minutes over the whole of the aircraft was incredible. As we tried to climb out of the icing layer the unbooted wing section just inboard of the engine nacelle had 30 or so mms of ice built up on it, the engines were suffering impact icing, the ice shed from the props was making a terrible din against the fueselage. Added to this was a buffeting from the airframe which felt very unusual.
I imagine it would have rated as a severe icing encounter and hope never ever to have to face it again. It made me all the more determined to get on to turbines ASAP.
