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Garmin G1000 Cockpit Reference Guide for the Columbia 350/400
SECTION 6 – AUTOMATIC
FLIGHT CONTROL
6-3
Automatic Disengagement
Automatic disengagement typically occurs due to a
failure. Automatic disengagement is annunciated by a
flashing ‘AP’, alternating red on white and white on red in
the Autopilot Status field. Also, the autopilot disconnect
aural alert will be heard. Both the annunciation and the
aural alert will continue until acknowledged by pressing
the AP DISC button or the MET switch.
Figure 6-6 Automatic Disconnect Annunciation
Automatic Disconnect
Manual Disengagement
The autopilot may also be manually disengaged
by pressing the AP DISC button, the GO AROUND
button, or by pressing the AP Key on the MFD. Manual
disengagement is annunciated by a five-second flashing
yellow ‘AP’ in the Autopilot Status field and by a two-
second Autopilot disconnect aural alert.
Figure 6-7 Manual Disconnect Annunciation
Manual Disconnect
Control Wheel Steering
Pressing and holding the CWS button disengages the
servos from the flight control surfaces and allows manual
manuevering of the aircraft. At the same time, the flight
director is synchronized to the aircraft attitude during the
maneuver. The ‘AP’ annunciation is temporarily replaced
by ‘CWS’ in white until the CWS button is released.
Figure 6-8 CWS Annunciation
Control Wheel Steering
6.4 LOSS OF DATA
In general, a flashing yellow mode annunciation
indicates either the loss of sensor data (AHRS, ADC,
or GIA) or loss of navigation data (VOR, LOC, or GPS)
required to compute commands.
When such a loss occurs, the system automatically
reverts to the default mode for the affected axis (wings
level ROL for roll axis, PIT for pitch axis). The flashing
annunciation stops when the pilot presses the affected
mode button or selects another mode for the axis. If no
pilot action is taken, the flashing annunciation stops after
ten seconds.
Figure 6-9 Loss of VOR Signal
6.5 PITCH AXIS MODES
Mode annunciations for active pitch axis modes are
shown in green during normal operation. Note the Go-
Around button is not located on the MFD.
AFCS Key AFCS Mode Annunciation
FD/AP only Pitch Hold (Default) PIT
ALT Altitude Hold ALT nnnnn FT
VS Vertical Speed VS nnnn FPM
FLC Flight Level Change FLC nnn KT
APR Glideslope (vertical
component of Approach)
GS
GO
AROUND
Go Around GA
The default pitch axis mode is Pitch Hold (PIT). When
no other pitch axis modes are selected, this is the active
pitch axis mode when the autopilot and/or flight director
is engaged.