Garmin G1000 Mooney M20TN User Manual download pdf (Page 309)

190-00647-00 Rev. A

Garmin G1000 Pilot’s Guide for the Mooney M20M/M20R/M20TN

7-9

AUTOMATIC FLIGHT CONTROL SYSTEM

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 armed automatically when the ﬂight director is in Pitch Hold, Vertical Speed, Flight

Level Change, or Go Around Mode. This armed mode is indicated by a white ‘ALT’ annunciation in the AFCS

Status Box. When armed, the ﬂight director commands a constant acceleration maneuver to capture and

level off at the Selected Altitude. When the ﬂight director starts the altitude capture, it transitions to Altitude

Hold Mode and holds the Selected Altitude; in this case, the Altitude Reference corresponds to the Selected

Altitude. The white ‘ALT’ annunciation moves to the active pitch mode ﬁeld and ﬂashes green for up to ten

seconds to indicate transition to Altitude Hold Mode.

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.

If the Selected Altitude is captured 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 captured.

Figure 7-6 Altitude Hold Mode

Altitude Hold

Mode Active

Flight Director

Altitude Reference

Selected Altitude

Selected Altitude Bug

Command Bars

Hold Pitch Attitude

to Maintain Altitude

Reference

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Garmin G1000 Mooney M20TN User Manual Page 309