When evaluating icing conditions, what is the critical altitude to monitor for light rime icing?

Monitoring for light rime icing is crucial for ensuring safety during flight, especially in conditions where moisture is present and temperatures are conducive to ice formation. The critical altitude for light rime icing is typically around 5,000 feet. This is due to the fact that temperature and moisture conditions at this altitude are often prime for the formation of ice, particularly when flying through clouds or areas of precipitation.

Flying at or above this altitude, pilots need to be especially vigilant, as even light rime icing can adversely affect the aircraft’s performance, aerodynamics, and control. Therefore, knowing the specific altitude where these conditions are likely to occur enables pilots to make informed decisions to mitigate the risks associated with icing.