Garmin G1000:Socata Pilot's Manual page 400

AUTOMATIC FLIGHT CONTROL SYSTEM
Prior to descent path interception, the Selected Altitude must be set below the current aircraft altitude
by at least 75 feet. For the flight director to transition from Altitude Hold to Vertical Path Tracking Mode,
acknowledgment is required within five minutes of descent path interception by:
• Pressing the VNV Key
If acknowledgment is not received within 1 minute of descent path interception, the white 'VPTH'
annunciation and the VNV Key annunciator light start to flash. Flashing continues until acknowledged or the
descent path is intercepted. If the descent is not confirmed by the time of interception, Vertical Path Tracking
Mode remains armed and the descent is not captured.
In conjunction with the "TOD [top of descent] within 1 minute" annunciation in the PFD Navigation Status
Box and the "Vertical track" voice message, VNV indications (VNV Target Altitude, vertical deviation, and
vertical speed required) appear on the PFDs in magenta (Figure 7-14).
GPS is
Selected
Navigation
Source
7-16
Altitude Hold
Mode Active
Figure 7-14 Vertical Path Capture
Garmin G1000 Pilot's Guide for the Socata TBM 850
• Adjusting the Selected Altitude
Vertical Path Tracking
Armed, (Flashing Indicates
Acknowledgment Required)
VNV Target
Altitude
Selected
Altitude
Below VNV
Target
Vertical
Deviation
Indicator
Required
Vertical
Speed Bug
Enroute
Phase of
Flight
190-00709-00 Rev. A