2.11 Barometric Setting
The barometric altimeter setting used for any barometric corrected altitude
source interfaced to the GTN must be set appropriate to the altitude type
depicted on the procedure (QNH or QFE).
2.12 RF Legs
This STC does not grant operational approval for RF leg navigation for those
operators requiring operational approval. Additional FAA approval may be
required for those aircraft intending to use the GTN as a means to provide RNP
1 navigation in accordance with FAA Advisory Circular AC 90-105.
The following limitations apply to procedures with RF legs:
Aircraft is limited to 180 KIAS while on the RF leg
RF legs are limited to RNP 1 procedures. RNP AR and RNP <1 are not
approved
Primary navigation guidance on RF legs must be shown on an EHSI
indicator with auto-slew capability turned ON
GTN Moving Map, EHSI Map, or Distance to Next Waypoint
information must be displayed to the pilot during the RF leg when
flying without the aid of the autopilot or flight director.
The active waypoint must be displayed in the pilot's primary field of
view.
2.13 Autopilot Coupling
The flight crew may fly all phases of flight based on the navigation information
presented to the flight crew; however, not all modes may be coupled to the
autopilot. All autopilots may be coupled in Oceanic (OCN), Enroute (ENR), and
Terminal (TERM) modes.
This installation is limited to:
Lateral coupling only for GPS approaches. Coupling to the vertical path for
GPS approaches is not authorized.
It is possible to create flight plan waypoint sequences, including Search and
Rescue patterns, which exceed the autopilot's bank angle capabilities. The pilot
shall monitor autopilot performance with regard to flight path deviation.
2.13.1 RNP 1.0 RF Leg Types
AC 90-105 states that procedures with RF legs must be flown using either a
flight director or coupled to the autopilot.
This STC has demonstrated acceptable crew workload and Flight Technical
Error for hand flown procedures with RF legs when the GTN installation
complies with limitation set forth in Section 2.12 of this document. It is
recommended to couple the autopilot for RF procedures, if available, but it is
190-01007-A2 Rev. 6
Page 14
AFMS, Garmin GTN GPS/SBAS System
FAA APPROVED
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