What should you do if you observe ice accretion on the flight deck side windows indicating SLD icing?

What should you do if you observe ice accretion on the flight deck side windows indicating SLD icing?

• A. Leave icing conditions
• B. Wing and Cowl Anti-icing systems must be On; Leave icing conditions
• C. Descend immediately
• D. Increase altitude to exit icing

Answer: (B)

Supercooled Large Droplet (SLD) icing creates rapid ice growth on surfaces not fully protected, and seeing ice on the flight deck side windows shows you’re in a zone with significant icing risk. The right action is to command your wing and nacelle anti-ice systems to ON and begin leaving the icing conditions. Turning on wing and cowl anti-ice helps protect critical surfaces from accumulating ice, preserving lift and engine performance, while moving out of the icing region reduces exposure to the droplets that caused the ice in the first place. Simply staying in place without anti-ice won’t stop the ice from forming, and trying to outlast it by changing altitude alone may not reliably place you in non-icing air. In short: activate anti-ice to protect surfaces, then maneuver to exit the icing environment.

Supercooled Large Droplet (SLD) icing creates rapid ice growth on surfaces not fully protected, and seeing ice on the flight deck side windows shows you’re in a zone with significant icing risk. The right action is to command your wing and nacelle anti-ice systems to ON and begin leaving the icing conditions. Turning on wing and cowl anti-ice helps protect critical surfaces from accumulating ice, preserving lift and engine performance, while moving out of the icing region reduces exposure to the droplets that caused the ice in the first place. Simply staying in place without anti-ice won’t stop the ice from forming, and trying to outlast it by changing altitude alone may not reliably place you in non-icing air. In short: activate anti-ice to protect surfaces, then maneuver to exit the icing environment.