When should landing speeds be set for ice accretion on the ERJ 170/175?

Landing speeds should be set for ice accretion during detected icing conditions. This is crucial because ice can significantly degrade an aircraft’s aerodynamic performance, affecting lift, drag, and stall speed. Icing conditions can lead to an increase in required landing speeds to ensure safe operations, as the aircraft may require greater speed to maintain control and prevent a stall during landing.

Properly adjusting landing speeds when icing conditions are present helps in mitigating risks associated with reduced control effectiveness and longer landing distances, which could jeopardize the landing. This practice emphasizes the importance of situational awareness and responding to environmental factors that might affect aircraft performance.

Determining the need for increased landing speeds based solely on passenger awareness or operating during summer does not take into account the variable nature of weather conditions. Also, setting speeds continuously when landing would be inappropriate since it does not consider the necessity of adjusting protocols based on ice accumulation, which can vary throughout the year or during different flight conditions.