CTS Winter Operations Practice Test – Prep, Questions & Study Guide

The holdover time for de-icing and anti-icing fluids, such as Type III fluid, is a critical consideration in winter operations to ensure safe flight. At an Outside Air Temperature (OAT) of 32°F (0°C) and light snow conditions, the holdover time reflects how long the fluid will effectively prevent ice formation on the aircraft surfaces.

For a 50/50 concentration of Type III fluid, the expected holdover time ranges from approximately 8 to 15 minutes. This range is based on various factors, including temperature, precipitation type, and intensity. In this case, light snow at freezing temperatures means that while the fluid can provide effective protection, it is also subject to the dilution effect of the falling snow.

Choosing the range of 8-15 minutes accurately represents the reasonable duration one can anticipate the Type III fluid to remain effective in these conditions before needing to reapply the fluid or perform additional de-icing procedures to ensure continued safety during flight operations.