What function does the Wing Anti-Ice provide when in STBY mode?

When the Wing Anti-Ice system is in STBY (standby) mode, it is designed to provide normal anti-ice functions, albeit in a limited capacity compared to its active mode. In STBY mode, the system remains operational but does not engage all the capabilities that would be used during standard or full operation. This allows the system to be ready for use without being fully activated, which softens the risk of icing conditions affecting the aircraft while potentially conserving energy and resources until full anti-ice functionality is truly needed.

The system's operational intent in this mode ensures that if the pilot or crew observes the onset of icing conditions, they have the ability to switch to full operational capability quickly, utilizing the normal features without needing a complete system reset or reactivation.