Garmin 4XXW Series Pilot's Manual Addendum

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Garmin 4XXW Series Pilot's Manual Addendum Manual pdf 17 page image

AFMS, Garmin GNS 4XXW GPS/SBAS System 190-00356-03 Rev. DFAA APPROVED Page 17 of 194.5 Coupling the Autopilot during approachesCAUTIONWhen the CDI source is changed on the GNS, autopilotmode may change. Confirm autopilot mode selection afterCDI source change on the GNS. Refer to the FAA approvedFlight Manual or Flight Manual Supplement for theautopilot. 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 GNS will issue a flashing messageindication with the following message “APR Guidance Available, UsePROC before A/P APR”.PROC Button ............................................................................... PRESS“Enable A/P APR Outputs?” .................................................... SELECTENT 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 GNS will enable vertical guidance.Vertical Guidance .........................................CONFIRM AVAILABLEAutopilot .............................................ENGAGE APPROACH MODE The autopilot does not support any vertical capture or tracking in thisinstallation.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.

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