When icing conditions exist or are likely, what is the recommended procedure for anti-ice/deice systems?

• A. Use anti-ice/deice systems as recommended by the POH guidelines when icing conditions exist or are likely
• B. Never use anti-ice in flight
• C. Only use deice on the ground
• D. Use anti-ice only at low altitude

Answer: (A)

When icing conditions exist or are likely, you engage anti-ice and deice systems according to the Pilot’s Operating Handbook. The POH tells you exactly when to activate each system, which surfaces are protected, and how long to run them, along with any limits or precautions. Anti-ice prevents ice from forming on critical surfaces, while de-ice removes ice that has already accumulated; many aircraft use both in different situations, following the recommended procedures. Icing can quickly raise stall speed, reduce lift, increase drag, and affect controllability, so following the POH guidance ensures you maintain safe handling and performance. Relying on ground-only use or limiting operation to low altitudes would leave you unprotected in many icing scenarios and contradict the approved procedures.