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SECTION 6 – AUTOMATIC
FLIGHT CONTROL
Selected Altitude Capture Mode (ALTS)
Selected Altitude Capture Mode arms automatically
when the flight director is in Pitch Hold, Vertical Speed,
Flight Level Change, or Go Around Mode. This mode
is also armed automatically under Vertical Path Tracking
Mode when the Selected Altitude is to be captured instead
of the VNAV Target Altitude (see the discussion on Vertical
Navigation Modes later in this section). The white 'ALTS'
annunciation indicates Selected Altitude Capture Mode is
armed (see Figure 6-5 for example).
The ALT Knob is used to set the Selected Altitude,
shown above the Altimeter until Selected Altitude Capture
Mode becomes active.
As the aircraft nears the Selected Altitude, the flight
director automatically transitions to Selected Altitude
Capture Mode with Altitude Hold Mode armed (Figure
6-7). This automatic transition is indicated by the green
'ALTS' annunciation flashing for up to ten seconds and the
appearance of the white 'ALT' annunciation. The Selected
Altitude is shown as the Altitude Reference beside the
'ALTS' annunciation.
At 50 ft from the Selected Altitude, the flight director
automatically transitions from Selected Altitude Capture
to Altitude Hold Mode and holds the Selected Altitude
(shown as the Altitude Reference). As Altitude Hold Mode
becomes active, the white 'ALT' annunciation moves to the
active pitch mode field and flashes green for ten seconds
to indicate the automatic transition.
Flash Up to 10 sec, Indicating Automatic Transition
Figure 6-6 Automatic Mode Transitions During Altitude Capture
6-6
Altitude Reference (In
This Case, Equal to
Selected Altitude)
Garmin G1000 Cockpit Reference Guide for the Columbia 350/400
Changing the Selected Altitude
NOTE: Pressing the CWS Button while in Selected
Altitude Capture Mode does not cancel the
mode.
Use of the ALT Knob to change the Selected Altitude
while Selected Altitude Capture Mode is active causes the
flight director to revert to Pitch Hold Mode with Selected
Altitude Capture Mode armed for the new Selected
Altitude.
Altitude Hold Mode (ALT)
Altitude Hold Mode can be activated by pressing the
ALT Key; the flight director maintains the current aircraft
altitude (to the nearest ten feet) as the Altitude Reference.
The flight director' s Altitude Reference is shown in the
AFCS Status Box and is independent of the Selected
Altitude, displayed above the Altimeter. Altitude Hold
Mode active is indicated by a green 'ALT' annunciation in
the AFCS Status Box.
Altitude Hold Mode is automatically armed when
the flight director is in Selected Altitude Capture Mode.
Selected Altitude Capture Mode automatically transitions
to Altitude Hold Mode when the altitude error is less than
50 ft. In this case, the Selected Altitude becomes the flight
director' s Altitude Reference.
Changing the Altitude Reference
NOTE: Turning the ALT Knob while in Altitude
Hold Mode changes the Selected Altitude, but
not the flight director's Altitude Reference and
does not cancel the mode.
With the CWS Button depressed, the aircraft can be
hand-flown to a new Altitude Reference. When the CWS
Button is released at the desired altitude, the new altitude
is established as the Altitude Reference.
190-00567-01 Rev. A
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