In an environment of -2°C with freezing precipitation, what de-icing/anti-icing procedure is required before departure for IFR with passengers?

• A. Deice with Type I and anti-ice with II, III, or IV.
• B. Deice with Type II and anti-ice with I.
• C. Deice with Type I and anti-ice with I.
• D. No deicing required.

Answer: (A)

In icing conditions like -2°C with freezing precipitation, you must first remove any ice or contamination on the aircraft and then apply a protective anti-icing coating before takeoff with passengers. The proper sequence is to use Type I as a de-icer to shed existing ice, then apply an anti-icing fluid from Type II, III, or IV to prevent new icing during taxi, takeoff, and the early climb. Type I does the cleaning work but offers no lasting protection, while the thicker Type II/III/IV fluids provide a temporary protective layer, the duration of which is governed by holdover times and the current conditions. Therefore de-icing with Type I followed by anti-icing with Type II, III, or IV is required. Deicing alone, or using an anti-ice fluid as a de-icer, would not meet the requirement, and skipping de-icing is not acceptable in these conditions.