User Guide

Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang
190-00494-00 Rev. B
7-10
AFCS
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 10 feet) as the Altitude Reference. The flight director’s Altitude Reference,
shown in the AFCS Status Box, 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
(see Figure 7-7). Selected Altitude Capture Mode automatically transitions to Altitude Hold Mode when the
altitude error is less than 50 feet. In this case, the Selected Altitude becomes the flight director’s Altitude
Reference.
CHANGING THE ALTITUDE REFERENCE
NOTE: Turning the ALT SEL 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.
If the Selected Altitude is reached during CWS maneuvering, the Altitude Reference is not changed. To
adjust the Altitude Reference in this case, the
CWS Button must be pressed again after the Selected Altitude
is reached.
Figure 7-9 Altitude Hold Mode
Altitude Hold Mode Active
Command Bars
Hold Pitch Attitude
to Maintain
Altitude Reference
Altitude Reference
Selected
Altitude
Selected
Altitude
Bug