190-01007-A2 Rev. 6 AFMS, Garmin GTN GPS/SBAS SystemPage 26 FAA APPROVED4.5 Coupling the Autopilot during approachesCAUTIONWhen the CDI source is changed on the GTN, autopilot modemay change. Confirm autopilot mode selection after CDIsource change on the GTN. Refer to the FAA approved FlightManual or Flight Manual Supplement for the autopilot.Analog only autopilots should use APR mode for coupling to LNAVapproaches. Autopilots which support digital roll steering commands (GPSS)may utilize NAV mode and take advantage of the digital tracking during LNAVonly approaches.
This installation prompts the flight crew and requires the pilot to enable theapproach outputs just prior to engaging the autopilot in APR mode.To couple an approach:Once established on the final approach course with the final approachfix as the active waypoint, the GTN will issue a flashing messageindication.Flashing Message Button ............................................................. PRESS“Enable APR Output” Button ...................................................... PRESSIf coupled, Autopilot will revert to ROL mode at this time.Autopilot ............................................ ENGAGE APPROACH MODE
This installation supports coupling to the autopilot in approach mode oncevertical guidance is available.To couple an approach:Once established on the final approach course with the final approachfix as the active waypoint, the GTN will enable vertical guidance.Vertical Guidance ........................................ CONFIRM AVAILABLEAutopilot ............................................ ENGAGE APPROACH MODE
The installation does not support any vertical capture or vertical tracking.