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2-3 Primary Flight Display

1.
The glideslope deviation scale represents the deviation from the glideslope.
The scale is always displayed.
2.
The glideslope deviation index shows the actual deviation and is only displayed when the NAV1 receiver gets an ILS signal.
3.
The localizer deviation scale represents the deviation from the loalizer.
It's only shown when the NAV-GPS switch is in NAV position and the NAV1 receiver gets an ILS signal.
2.
The localizer deviation index shows the actual deviation from the localizer and is only displayed when the NAV1 receiver gets an ILS signal and the NAV-GPS switch is in NAV position.
The radio altitude (RA) read-out is only shown below 2500 feet RA. When the aircraft descends below the decision height, the read-out turns red.