What is the main concern when flying through severe icing conditions?

When flying through severe icing conditions, the primary concern is flight diversion due to control failure. Severe icing can significantly alter an aircraft's performance and handling characteristics. Ice accumulation on wings and control surfaces can lead to a loss of lift, increased drag, and challenges in maintaining stable flight. This can result in dangerous situations where the pilot may lose control of the aircraft, prompting the need for immediate action such as diverting to a safe location to land.

While increased fuel consumption, equipment malfunction, and pilot fatigue are related to the overall challenges posed by adverse weather conditions, they are secondary to the immediate threat posed by loss of control due to severe icing. The impact on aerodynamic performance and the risk of stall or control issues is a critical factor in managing safety in such scenarios.