Honeywell FMZ Series Pilot's Manual page 336

Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
The FMS operating mode is selected using the appropriate line select
key, as shown in Figure 6--132. After selecting an operating mode or the
RETURN prompt (1R), MAINTENANCE 1/3 page is displayed.
00756.07
Figure 6- -132
OPERATING MODE 1/1
A28- - 1146- - 181
Navigation
6-178 REV 3 Mar 2009
Honeywell International Inc. Do not copy without express permission of Honeywell.