AIRPLANE
OPERATIONS
MANUAL
AUTOPILOT
REVISION 36
2-19-10
Page
5
Code
01
AOM-145/1114
Select the Localizer mode by pressing the NAV or APR buttons on the
flight guidance controller with ILS as the selected navigation source. In
this case, the HDG select mode is automatically selected and the
localizer is armed. On an ILS approach, when the localizer is armed
and the APR button is pressed, the Glide Slope is also armed.
The localizer mode captures are based on course error and beam
deviation. At the point of capture, the current armed mode (LOC or
BC) is selected and locked, while HDG select mode is canceled. The
LOC mode capture or BC mode capture is annunciated on the PFD by
a green LOC or green BC label, respectively.
After captured, the mode will be canceled or inhibited if any of the
following conditions occur:
Pressing the NAV or APR buttons.
Selecting HDG mode.
Changing the displayed NAV source on the PFD.
Changing the displayed heading source on the PFD.
When the displayed heading is invalid.
When the displayed NAV source is invalid for more than
5 seconds.
When the displayed Glide Slope deviation is invalid for more
than 5 seconds, with GS mode captured.
When the on-side attitude is invalid.
When the selected air data source is invalid.
Pressing Go Around button.
Turn Control Knob out of detent with autopilot engaged.
LNAV MODE
The LNAV mode allows the Flight Director to capture and track the roll
steering signal from the long range navigation system (FMS/GPS).
With FMS selected on the PFD, select LNAV mode by pressing the
NAV button on the Flight Guidance Controller. This mode will
automatically engage HDG select mode, triggering a green HDG
annunciation on the PFD in conjunction with a white LNAV
annunciation, also on the PFD.
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