Which of the following is NOT considered a critical surface requiring de-icing attention?

• A. Passenger seating area
• B. Wings
• C. Tail
• D. Pitot & Static Ports

Answer: (A)

De-icing focuses on surfaces that interact with the airflow and on data-making sensors, because ice there directly affects lift, stability, control, and instrument accuracy. Wings are critical because ice disrupts the wing’s shape and can raise stall speed, reducing lift and maneuverability. The tail surfaces are also essential for stability and control; ice can impair elevator and rudder effectiveness, making coordinated flight difficult. Pitot and static ports are vital for accurate airspeed and altitude readings; ice can cause erroneous indications, leading to dangerous flight decisions or unexpected behavior. The passenger seating area, being interior and not part of the aerodynamic surfaces or air data system, isn’t something addressed by de-icing.