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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
Alphanumeric Keys
The MCDU alphanumeric keyboard is used by the pilot for input to the
FMS. The alphanumeric keys make entries to the scratchpad only.
The following are each represented with a key on the MCDU:
Letters of the alphabet
D
The numbers 0--9
D
The decimal
D
The plus/minus
D
The space
D
The slash.
D
See Figure 3--1 for key location. The SP (space) key is used to insert
a space following a character in the scratchpad. The +/- - (plus/minus)
key is used to enter a -- or + in the scratchpad. Pushing the +/- - key
initially results in a -- being entered. A subsequent pushing changes the
-- to a +. Continued pushing of +/- - key toggles the +/-- display.
Scratchpad
The bottom line on the MCDU is the scratchpad. The scratchpad is a
working area where the pilot enters data and/or verifies data before line
selecting the data into its proper position. Alphanumeric entries are
made to the scratchpad using the keyboard. As each key is pushed, the
character is displayed in the scratchpad. Information in the scratchpad
does not affect the FMS until the information is moved to another line
on the display. Data is retained in the scratchpad throughout all mode
and page changes. Follow Procedure 3--1 to edit any scratchpad entry
of the MCDU.
System Components
3-4
Honeywell International Inc. Do not copy without express permission of Honeywell.
A28- - 1146- - 181
REV 3 Mar 2009
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