FMS GENERAL DESCRIPTION
18 MCDU
Data Entry
Data is entered in the scratchpad from left to right using the
alphanumeric keys. The pilot transfers the data to a data field by
pressing the associated line select key [LSK].
Caution
Data entered in the scratchpad should be carefully checked before
pressing the relevant Line Select Key.
Altitude is displayed or entered as an altitude or as a flight level
depending on aircraft is above or below the transition altitude.
As a general rule, entry of an altitude requires at least four digits,
two-digit or three-digit entries are taken as flight levels.
When entering altitudes below 1000, the pilot must type a zero before
typing the altitude itself (e.g. 0500 for 500). A flight level can be
entered with or without the leading "FL".
When a data field contains two or more elements [ ]/[ ], it can be
entered one by one or as a single entry but separated by a slash.
If the first element is entered alone, it does not need to be followed by
a slash.
If the second element is entered alone, it must be preceded by one or
two slashes in order to be correctly identified by the FMS.
If the scratchpad contains an FMS-generated message, typing
characters overwrites the whole message.
When the pilot intends to make an action on the MCDU, which is not
allowed (e.g. enter data into a field where no data may be entered),
the white message "NOT ALLOWED" is displayed in the scratchpad.
Simultaneous data entry in the two MCDUs is not a limitation but
should be avoided.
Data formats are described in the next chapters and listed in the
appendices at the end of the Pilot's Guide.
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
To Next Page
Loading...