J7886 D180 v1.1
Page 17 of 20
5.4 AP74 Autopilot Control
The AP74 has all the functionality of the EFIS > AP menu while providing an alternate way to interpret
and use the Autopilot.
5.4.1 AP74 Indicators
The AP74 red button indicator lights have the
following meanings:
AP
ON when
any
servo is active.
HDG
ON when the roll servo is armed or active
in the heading mode.
TRK
ON when the roll servo is armed or active
in the ground track mode.
NAV
ON when the roll servo is armed or active
in the GPS navigation mode.
ALT
ON when the pitch servo is armed or
active in the altitude mode.
5.4.2 AP74 Controls
AP Button
When its indicator is off, pressing the AP button engages the AP in the pre-armed
mode(s).
When the AP button’s indicator is on, pressing the AP button disengages all axes of
the AP, but leaves the last-used modes armed.
If you push and hold the AP button for 2 seconds, the AP engages in 180 Mode.
NOTE
:
The HDG/TRK and ALT bugs are synchronized to the heading/track and altitude
values each time the AP is engaged.
VALUE Knob
When no menus are displayed, the VALUE knob changes the HDG/TRK bug, ALT
bug or BARO setting. Press the VALUE knob to cycle between modes.
When in any EFIS menu which adjusts a numerical value, turning the VALUE knob
adjusts the selected parameter.
Pressing the VALUE knob when in any menu exits the menu system completely.
Pushing and holding the knob while changing a bug synchronizes the bug to the
current value.
HDG Button
When its indicator is off, pressing the HDG button arms the roll servo in Heading
Mode and turns on the indicator.
When its indicator is on, pressing the button disarms/deactivates the roll servo and
turns off the button’s indicator.
TRK Button
When its indicator is off, pressing the TRK button arms the roll servo in Track Mode
and turns on the indicator.
