Autotune - Honeywell FMZ Series Pilot's Manual

Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter

Autotune

The autotune function permits the FMS to automatically select and tune
the navaid. No pilot interaction is required.
The FMS tunes the VOR the pilot most likely would tune. When the
VOR is required for navigation, the FMS tunes the VOR so the most
optimum VOR/DME position is established.
Autotune is automatically enabled after a power--up when LNAV mode
is selected before the pilot makes any changes to the NAV frequency.
When the pilot changes the NAV frequency, autotune is re--established
by following Procedure 6--16.
The FMS autotunes the localizer frequency for localizer--based
approaches. For localizer autotuning, frequency confirmation from the
NAV receiver is conducted but the data is not checked by the FMS. The
pilot must rely on the primary instrument flags to determine the validity
of the signals.
Step Procedure 6- -16 NAV Tuning by Selecting Autotune
1 Confirm the VOR radio is not selected as the navigation
source on either side EFIS. This includes the VOR mode,
ILS mode or preview mode.
2 Confirm the VOR radio is not in the manual tune mode.
3 Select PROG from the MCDU panel.
A28- - 1146- - 181
REV 3 Mar 2009
Honeywell International Inc. Do not copy without express permission of Honeywell.
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