Garmin SOCATA TBM850, Pilot'S Manual

Page: 513 / 684

190-00709-04 Rev. A
Garmin G1000 Pilot’s Guide for the Socata TBM 850
499
AUTOMATIC FLIGHT CONTROL SYSTEM
Figure 7-29 Backcourse Mode
LOC2 is Selected Navigation Source
Command Bars Hold Pitch Attitude
Pitch Hold
Mode Active
Backcourse
Mode Active
CHANGING THE SELECTED COURSE
If the navigation source is VOR or localizer or OBS Mode has been enabled when using GPS, the Selected
Course is controlled using the
CRS
Knob corresponding to the selected flight director (
CRS1
for the pilot
side, CRS2 for the copilot side).
Pressing the CWS Button and hand-flying the aircraft does not reset any reference data while in Backcourse
Mode. The autopilot guides the aircraft back to the Selected Course when the CWS Button is released.
INTERCEPTING AND FLYING A DME ARC
The AFCS will intercept and track a DME arc that is part of the active flight plan provided that GPS
Navigation Mode is engaged, GPS is the active navigation source on the CDI, and the DME arc segment is
the active flight plan leg. It is important to note that automatic navigation of DME arcs is based on GPS.
Thus, even if the APR key is pressed and LOC or VOR Approach Mode is armed prior to reaching the Initial
Approach Fix (IAF), Approach Mode will not activate until the arc segment is completed.
If the pilot decides to intercept the arc at a location other than the published IAF (i.e. ATC provides vectors
to intercept the arc) and subsequently selects Heading Mode or Roll Mode, the AFCS will not automatically
intercept or track the arc unless the pilot activates the arc leg of the flight plan and arms GPS Navigation
Mode. The AFCS will not intercept and fly a DME arc before reaching an IAF that defines the beginning of the
arc segment. Likewise, if at any point while established on the DME arc the pilot deselects GPS Navigation
Mode, the AFCS will no longer track the arc.