The windshield heat must be used during flight under which condition?

• A. Always
• B. Only when icing conditions exist
• C. Only above 3000 ft
• D. Never

Answer: (A)

Windshield heat is part of the aircraft’s anti-ice and anti-fog protection for the cockpit visibility. It should be used during flight at all times because any exposure to moisture, rain, humidity, or supercooled droplets in the air can cause ice or fog on the windshield, which rapidly degrades visibility. The heating elements keep the windshield surface warm enough to prevent ice formation and to reduce condensation, ensuring a clear view ahead throughout the flight. Relying on icing conditions alone to justify turning it on isn’t sufficient, since icing can begin with moisture and temperature conditions that aren’t immediately obvious. Keeping the windshield heat on during flight is the standard practice to maintain visibility and safety.