190-00709-05 Rev. D
Garmin G1000 Pilot’s Guide for the Socata TBM 850/900
519
AUTOMATIC FLIGHT CONTROL SYSTEM
NOTE:
Some RNAV (GPS) approaches provide a vertical descent angle as an aid in flying a stabilized
approach. These approaches are NOT considered Approaches with Vertical Guidance (APV). Approaches
that are annunciated on the HSI as LNAV or LNAV+V are considered Nonprecision Approaches (NPA) and
are flown to an MDA even though vertical glidepath (GP) information may be provided.
WARNING:
When flying an LNAV approach (with vertical descent angle) with the autopilot coupled, the
aircraft will not level off at the MDA even if the MDA is set in the altitude preselect.
Upon reaching the glidepath, the flight director transitions to Glidepath Mode and begins to capture and
track the glidepath.
Figure 7-17 Glidepath Mode Armed
Once the following conditions have been met, the glidepath can be captured:
• The active waypoint is at or after the final approach fix (FAF).
• Vertical deviation is valid.
• The CDI is at less than full scale deviation
• Automatic sequencing of waypoints has not been suspended (no ‘SUSP’ annunciation on the HSI)
Figure 7-18 Glidepath Mode
Command Bars Indicate
Descent on Glidepath
Glidepath
Mode Active
GPS Approach
Mode Active
Glidepath
Indicator
LNAV/VNAV
Approach
Active
GPS is Selected
Navigation
Source
