What is the maximum temperature at which Type I de-icing fluid should be used effectively?

The correct answer highlights that Type I de-icing fluid is effective at temperatures typically above -10°C to -15°C (14°F to 5°F). This temperature range is significant because Type I fluids, which are designed to remove ice and snow from aircraft surfaces, have a higher viscosity and lower freezing point, allowing them to work effectively in challenging winter conditions.

Using Type I fluid within this temperature range ensures that it can effectively de-ice surfaces while still being fluid enough to efficiently flow off and carry contaminants away. Beyond this range, particularly in temperatures well above 0°C (32°F), the fluid may lose its effectiveness in combating ice accumulation as other considerations about fluid dynamics come into play.

In terms of the practical application of Type I de-icing fluid, understanding this temperature limit is critical for maintaining aircraft safety and performance in winter weather.