What is the clean-aircraft concept?

• A. It prevents takeoff if frost, ice, or snow is adhering to critical surfaces.
• B. It requires cabin cleanliness.
• C. It ensures noise abatement.
• D. It relates to cockpit cleanliness.

Answer: (A)

The clean-aircraft concept is about ensuring surfaces that influence aerodynamics and propulsion are free of contamination before takeoff. Frost, ice, or snow on critical surfaces such as the wings, tail, or engine inlets can disrupt airflow, raise stall speed, reduce lift and control effectiveness, and even affect engine performance. Because these surfaces directly impact how the airplane flies, removing any contamination guarantees more predictable handling and safer takeoff conditions. Cleanliness inside the cabin or cockpit and noise abatement are not tied to this safety concept.