Anti-ice valve status

Select anti-ice

Anti-ice synoptic ^[198]

Select the anti-ice synoptic and note the present overhead selections in a suitable practice environment.

Compare one selected anti-ice function with its valve and flow indications.

Valve indications

Selection ≠ valve state

FSS lists amber dashed/no line as undetermined, amber-crossed white as failed closed, and amber-crossed green as failed open. The current Welcome page does not explain why these details are highlighted in red. Treat them as unverified until confirmed in your installed aircraft.

Read whether the valve is shown open or closed.

Air source and phase

Check the phase of flight, automatic logic and air source before assuming that a selected control must mean an open valve.