How can you verify that the anti-ice system is functioning correctly?

Verifying that the anti-ice system is functioning correctly involves checking specific parameters that indicate proper operation. The most effective method is to check the temperature readings on the Weather and Acquisition Processor (WAP). This system is designed to monitor and display vital data regarding the aircraft's environmental conditions, including temperatures that are critical to the performance of the anti-ice system.

If the WAP indicates that temperatures are within the operational limits necessary for the anti-ice systems, it provides immediate and reliable evidence that the system is operational. It allows pilots to confirm that the anti-ice system is activating as needed to prevent ice buildup, which is crucial for safe operation, especially in conditions conducive to icing.

Other methods, such as reviewing the operational checklist or observing wing surface temperatures, do not provide as direct or immediate verification of system functionality as checking the WAP readings does. Performing a system self-test is important for system diagnostics but may not reflect real-time operational conditions. Therefore, utilizing temperature readings from the WAP is the most definitive approach to ensure that the anti-ice system is functioning correctly.