Route Entry
During the ADIRU alignment, the flight crew may enter the desired flight plan. This is done on the INIT A page of the MCDU. The flight plan consists of the ORIGIN / DESTINATION airports, the airways used, the cruise altitude, step altitudes, performance factors etc. The route entry is detailed in the MCDU part of the guide.
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In addition to the route entry, the FCU should be site up ready for flight and the performance data entered into the MCDU.
pushing in the heading knob in will arm the MCDU NAV mode, so long as a suitable flight plan has been entered into the MCDU
If the selected altitude on the FCU is above the first altitude constraint then the target altitude shown on the altitude tape will be in magenta., otherwise it would be shown in blue
pushing in the Altitude knob in will arm the MCDU climb mode, so long as all the
performance data has been entered into the MCDU.
The magenta altitude indicates that the first altitude that the aircraft will be guided to is a constraint altitude.
When the target altitude is shown as blue, the aircraft will be guided to the altitude that is being displayed on the FCU.
CLB is shown in the 2nd FMA column as the armed mode. It is in blue if the FCU altitude
is the current target altitude. Else it is in magenta if the current target altitude
is a constraint altitude from the MCDU.
NAV is shown in the 3rd FMA column as the armed mode.
The MCDU section for V speed entry details how to enter the V speeds and observe
their values on the PFD. The V speed settings may be obtained from the Take Of settings
table reference