What is one possible consequence of roll upset due to severe icing conditions?

In severe icing conditions, the accumulation of ice on the wings and control surfaces of an aircraft can significantly alter its aerodynamic properties. This can lead to a situation known as roll upset, where the aircraft's ability to control its roll motion is compromised.

When ice forms on the wings, it disrupts the airflow over the surfaces, resulting in a loss of lift and increased drag. This can manifest as a degradation of the aircraft's roll-handling characteristics, making it difficult for the pilot to maintain coordinated flight. The control inputs that typically work to keep the aircraft level and stable may become ineffective, leading to unintended and uncommanded rolling motions.

Understanding this consequence is crucial for pilots, especially when flying in conditions where icing is possible. Recognizing the risks associated with roll upset can help prepare pilots to take corrective actions, such as reducing airspeed, changing altitude, or utilizing de-icing equipment if available, to regain control and maintain safe flying conditions.