Radio Minimums Alert

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.

Altitude Alert

When the airplane descends below 2500 feet, ALT shows in white on the DU above the radio altitude display. Each of these will remove the ALT display:

· The airplane climbs above 2500 feet radio altitude

· The airplane descends below 500 feet radio altitude

· The minimums reference selector is in the RADIO position and the reset switch is pushed.

Rising Runway

The rising runway shows in two colors, a magenta stem with a green trapezoid box on the top. The rising runway shows at the bottom of the ADI when these conditions occur:

· Radio altitude is less than 2500 feet

· ILS localizer deviation shows on the ADI.

The rising runway symbol moves toward the airplane symbol on the ADI as the airplane altitude decreases from 200 feet to 0 feet. At 0 feet, the rising runway shows at the bottom of the airplane symbol. The rising runway symbol also moves left and right to stay aligned with the ILS localizer deviation pointer.

RA SYSTEM - OPERATION – 2

RA Data NCD

RA data NCD causes the RA display and rising runway symbol to be removed. The NCD occurs when the return RA signals are too weak or the radio altitude is more than 2500 feet. Also, the rising runway will not show when the ILS is not captured.

Дата добавления: 2015-11-14