Ice Accretion: The formation of ice on the exposed surfaces of an aeroplane in flight.
There are three types of ice formation: (1) A white crystalline deposit (hoarfrost) formed by direct change from water vapour in the air.
Ice accretion on the wing leading edge is a major concern for aircraft not equipped with anti-icing or de-icing.
Airframe icing is ice accretions on the airplane, except for the propulsion system.
lowing it to run back and off the protected surface or freeze on non-critical
Where and When Icing Occurs ...
You may expect that ice accretion will not be the same for both wings and that each wing will stall at different speeds and angles. That will introduce a rolling action toward the stalled wing.
It occurs at conditions between those that form pure clear and pure rime ice. Similar to clear ice, mixed ice accretions can significantly disrupt airflow and cause handling and performance problems.
See also: Aircraft, Landing, Pilot, Flight, Icing