Which aircraft surfaces require priority during de-icing?

The correct focus for de-icing procedures is on critical surfaces such as wings, tail, and control surfaces. These areas are essential for the aircraft's aerodynamic performance and stability during takeoff, flight, and landing. Ice accumulation on the wings can significantly disrupt airflow, leading to reduced lift and compromised aircraft handling. Similarly, the tail and control surfaces, which include ailerons, elevators, and rudders, play vital roles in controlling the aircraft's pitch, roll, and yaw. Any ice on these surfaces can lead to control issues, making it imperative to prioritize their de-icing.

While other areas like the underside of the wings, fuselage, landing gear, and areas around the engines are important for overall safety and functionality, they do not pose the same immediate risk to flight performance as the critical surfaces do. Therefore, prioritizing the de-icing of critical surfaces ensures the aircraft maintains its necessary aerodynamic characteristics and control authority during all phases of flight.