What precaution should be taken when using truck-mounted deice/anti-ice equipment?

Using truck-mounted deice/anti-ice equipment requires specific precautions to avoid damage to vital aircraft components. The approach of indirectly spraying pitot inlets and static ports is particularly crucial because these components are sensitive and can be easily impacted by direct application of deicing fluids.

Directly spraying these areas can lead to blockages or incorrect readings, which are critical for accurate airspeed and altitude measurements. By opting for indirect spraying, you ensure that ice and snow are removed while minimizing the risk of damaging the sensitive instruments. This method allows the deicing fluid to flow over the surfaces effectively without the potential for harm that comes with a direct application.

The other options, such as spraying all surfaces evenly or using heated fluids at high pressure, may not provide the necessary targeted application required for the unique needs of pitot and static systems. This careful consideration for the structures you're working on is essential for maintaining safety and operational integrity during flight operations.