What type of conditions necessitate a review of anti-ice procedures before takeoff?

The need to review anti-ice procedures before takeoff is primarily associated with conditions of ice accumulation. In the aviation context, ice accumulation on the aircraft can significantly affect its performance, control, and safety during flight. Ice can alter the aerodynamics of the wings and other surfaces, increase drag, and decrease lift, which could lead to dangerous situations, particularly during takeoff and landing phases.

Reviewing anti-ice procedures ensures that the aircraft is properly prepared to handle the adverse effects of ice, including the operation of de-icing systems, appropriate use of anti-ice fluids, and adherence to specific pre-flight checklists designed to mitigate the risks associated with ice. In contrast, clear skies, heavy rain, and sunny weather do not typically present the same level of risk regarding ice accumulation, making them less critical for requiring a review of anti-ice procedures.