Amber COM Frequency Digits
A discrepancy between the active COM frequency on the PFW, and the actual tuned frequency reported by the controlling Integrated Avionics Unit (IAU), causes the active COM frequency digits on the PFW, to turn amber.
A discrepancy between the active COM frequency on the PFW, and the actual tuned frequency reported by the controlling Integrated Avionics Unit (IAU), causes the active COM frequency digits on the PFW, to turn amber.