Afcs Reversionary Mode; Failure Of The External Gps Navigation Source; Synthetic Vision Troubleshooting - Garmin G3X Touch Pilot's Manual

Appendix F

AFCS REVERSIONARY MODE

In a two display system, in the event of a PFD failure, the MFD goes into reversionary
mode, and the autopilot is disengaged. If the MFD fails, the PFD goes into reversionary
mode and the autopilot continues to function.
In a GMC 305/307/507 installation, in the event of display failure(s), basic autopilot
functionality remains as long as a ADAHRS unit is still available. The FD is no longer
available, but LVL, AP, ALT, and YD are available.

FAILURE OF THE EXTERNAL GPS NAVIGATION SOURCE

If the PFD has automatically reverted to using its own internal GPS navigation source
due to unavailability of external GPS navigation data, 'REV' is displayed in the lower
left quadrant of the HSI and 'VFR' is displayed in the lower right quadrant. In addition,
a "Using internal GPS flight plan for navigation" system message is displayed.

SYNTHETIC VISION TROUBLESHOOTING

Synthetic Vision is intended to be used with traditional attitude, heading,
obstacle, terrain, and traffic inputs (in most areas). Synthetic Vision is disabled
when valid attitude or heading data is not available for the display. In case
of invalid Synthetic Vision data, the PFD display reverts to the standard blue-
over-brown attitude display.
Synthetic Vision becomes disabled without the following data resources:
• Attitude data
• Heading data
• GPS position data
• Terrain data
• The position of the aircraft exceeds the range of the terrain database
REVERSIONARY MODE WITH SYNTHETIC VISION
Synthetic Vision can be displayed on the remaining display(s) in Reversionary
Mode. If it is enabled when the system switches to Reversionary Mode,
Synthetic Vision may take up to 30 seconds to display. The standard display
will be shown in the interim.
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Garmin G3X Touch Pilot's Guide 190-01754-00 Rev. L