Installation Instructions

GTN 6XX/7XX AML STC Installation Manual 190-01007-A3
Page C-4 Rev. 4
C.4 Autopilot
Autopilots that will be coupled to GPS vertical guidance for GPS approaches must be specifically listed
in the table below, unless the interface to the autopilot is installed in accordance with the G500
(STC #SA02015SE-D) or G600 (STC #SA02153LA-D) AML STC.
Autopilots not listed below can still be approved under the GTN AML STC if all of the following
conditions are met:
• The installation of the autopilot was previously FAA-approved;
• All interfaces between the GTN and the autopilot are analog;
• The installation must use existing navigation signals which interface the autopilot to a standard
VHF navigation receiver (i.e. CDI/HSI L/R and Up/Dn)
• A successful in-air flight check must be completed prior to returning the aircraft to service.
• The AFMS is properly completed, limiting the GPS to lateral coupling only (LNAV) unless the
autopilot is listed as an approved interface in the G500 or G600 AML STC.
If these conditions are met the interface can be approved under this GTN AML STC. These autopilots are
limited to those operations for which they were previously FAA-approved when interfaced with the other
TC'd or STC'd navigation units (e.g. if the previous unit was installed and approved for coupled VOR,
ILS, LOC, BC and GPS LNAV approaches, this upgraded installation will also be approved for these
operations; however, GPS and RNAV approaches with GPS/SBAS-based vertical guidance (LNAV+V,
L/VNAV and LPV modes on the GTN) are not authorized when coupled to the autopilot), unless the
autopilot is listed as an approved interface in the G500 or G600 AML STC.
If the GTN 6XX/7XX is connected to a GDU 620, the GTN 6XX/7XX STC does not impose any vertical
coupling limitations on the interface between the GDU 620 and the autopilot.