"...Originally Posted by 14 CFR 121, para 629: Operation in Icing Conditions
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(b) No person may take off an aircraft when frost, ice, or snow is adhering[/B] to the wings, control surfaces, propellers, engine inlets, or other critical surfaces of the aircraft or when the takeoff would not be in compliance with paragraph (c) of this section..."
I would like just to rise a question about the interpretation of the FAR.
You could read "...when frost, ice, or snow is adhering to the wings...".
Was the snow on the wings adhered?