These six reports detail some typical ground icing accidents of the 1940’s through the 1960’s. It is possible that the assertions of Carroll, MacAvoy and Samuels (see Historical Papers), which suggested that not all icing was necessarily dangerous and that frost was almost never a threat, persisted, in all likelihood reinforced by considerable wartime experience. The facilities to properly deice a transport aircraft were not always available, much as is the case today with small cargo feeder operations. In the case of Ozark 982, the crew was aware that ice had accreted during the approach, but opted not to remove it prior to departure.
The details surrounding Commuter 502 are nearly identical to many general aviation ground icing accidents that continue to occur today. Suffice to say that snow does not blow off the wing with anything approaching the remotest reliability.