Afcs Modes; Vertical Modes - Garmin G1000 NXi Pilot's Manual

AUTOMATIC FLIGHT CONTROL SYSTEM

7.3 AFCS MODES

The AFCS is capable of operating in a variety of independent Lateral Modes, Vertical Modes and Combination
of both the Lateral and Vertical Modes.

VERTICAL MODES

The following table lists the vertical modes with their corresponding controls and annunciations. The mode
reference is displayed next to the active mode annunciation for Altitude Hold, Vertical Speed, and Flight Level
Change modes. The NOSE UP/DN Wheel can be used to change the vertical mode reference while operating
under Pitch Hold, Vertical Speed, or Flight Level Change Mode.
Vertical Mode
Pitch Hold
Selected Altitude Capture
Altitude Hold
Vertical Speed
Flight Level Change, IAS Hold
* ALTS armed automatically when PIT, VS, FLC, TO, or GA active, and under VPTH when Selected Altitude is to be captured instead
of VNV Target Altitude
PITCH HOLD MODE (PIT)
When the flight director is activated (the FD Key is pressed), Pitch Hold Mode is selected by default. Pitch
Hold Mode is indicated as the active vertical mode by the green 'PIT' annunciation. This mode may be used
for climb or descent to the Selected Altitude (shown above the Altimeter), since Selected Altitude Capture
Mode is automatically armed when Pitch Hold Mode is activated.
In Pitch Hold Mode, the flight director maintains a constant pitch attitude, the pitch reference. The pitch
reference is set to the aircraft pitch attitude at the moment of mode selection. If the aircraft pitch attitude
exceeds the flight director pitch command limitations, the flight director commands a pitch angle equal to
the nose-up/down limit.
344
Description
Holds the current aircraft pitch
attitude; may be used to climb/
descend to the Selected Altitude
Captures the Selected Altitude
Holds the current Altitude Reference ALT Key ALT nnnnn
Maintains the current aircraft vertical
speed; may be used to climb/descend
to the Selected Altitude
Maintains the current aircraft
airspeed in IAS while the aircraft is
climbing/descending to the Selected
Altitude
Table 7-2 Flight Director Vertical Modes
Garmin G1000 NXi Pilot's Guide for the Cessna Nav III
Reference
Control Annunciation
(default) PIT -15° to +20°
* ALTS
fT
VS Key
VS nnnn
fpm
+1500 fpm
80 to 200 kts
FLC Key FLC
nnn
kT
80 to 210 kts
Reference
Change
Range
Increment
0.5°
-2000 to
100 fpm
(350)
1 kt
(400)
190-02177-00 Rev. A