What is an important factor to monitor when flying in icy conditions?

Monitoring wing and tail surfaces for ice accumulation is crucial when flying in icy conditions because ice can significantly affect an aircraft's aerodynamic performance and control. Ice accumulation on the wings alters their shape, reducing lift and potentially leading to stall conditions, while ice on the tail surfaces can impact stability and maneuverability. Ice can also disrupt the airflow over control surfaces, making it more difficult to maintain safe flight characteristics.

Detecting and mitigating ice can involve visual inspections, utilizing de-icing or anti-icing systems, and adhering to standard operating procedures designed for icy conditions. Therefore, being vigilant about ice on these critical surfaces is essential for maintaining aircraft control and ensuring the safety of the flight.

Other factors, while important in their respective contexts, do not have the same direct and immediate impact on flight safety in icy conditions. For instance, engine oil temperature is essential for overall engine performance, cabin altitude is critical for passenger safety and comfort, and exterior lighting systems play a role in visibility, but none of these directly addresses the immediate aerodynamic challenges posed by ice on the wings and tail surfaces.