A radio minimums alert occurs when the radio altitude of the aircraft is the same as the selected radio mins altitude value from the EFIS control panel. The radio minimums alerts occur separately between the captain and first officer displays.
When a radio minimums alert occurs, the radio altitude display changes from white to amber.
Also, the radio minimums display changes from green to amber and goes off and on for three seconds.
After three seconds, the display continues to show amber until it is set back to normal.
Each of these procedures sets the radio minimums alert back to normal:
· Push the reset (RST) switch on the EFIS control panel
· The airplane climbs to 75 feet above the radio minimums value
· The airplane lands.
When radio minimums is set to normal, the radio altitude goes back to white, and the radio minimums display goes back to green.