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190-01007-A1 System Maintenance Manual GTN 6XX/7XX Part 23 AML STC
Rev. 7 Page 2-1
2 SYSTEM DESCRIPTION
2.1 Equipment Descriptions
2.1.1 GTN 6XX/7XX Navigators and GMA 35
The GTN SBAS navigators are a family of aviation panel mounted retro-fit products. The following
sections will describe the available functions for each unit in the GTN 6XX/7XX navigators.
2.1.1.1 GTN 6XX
The GTN 6XX SBAS navigators are a family of panel-mounted GPS/NAV/COM navigators.
The GTN 6XX units include the GTN 625, GTN 635, and GTN 650. They are 6.25" wide and 2.65" tall.
The GTN 6XX features a 600 by 266 pixel color LCD touchscreen. The GTN 625 is a GPS/SBAS unit that
meets the requirements of Technical Standard Order TSO-C146c and may be approved for IFR en route,
terminal, oceanic, non-precision, and precision approach operations when installed in accordance with the
instructions in the manuals referenced in the GTN AML STC. The
GTN 635 includes all of the features of the GTN 625 in addition to an airborne VHF communications
transceiver. The GTN 650 includes all of the features of the GTN 625 in addition to an airborne VHF
communications transceiver and airborne VOR/localizer (LOC) and glideslope (G/S) receivers.
2.1.1.2 GTN 7XX
The GTN 7XX SBAS navigators are a family of GPS/NAV/COM aviation panel-mounted products. The
GTN 7XX units include the GTN 725 and GTN 750. The GTN 7XX units are 6.25" wide and 6.00" tall.
They feature a 600 by 708 pixel color LCD touchscreen. The GTN 725 is a GPS/SBAS unit that meets the
requirements of Technical Standard Order TSO-C146c and may be approved for IFR en route, terminal,
oceanic, non-precision, and precision approach operations when installed in accordance with the
instructions in the manuals referenced in the GTN AML STC. The GTN 750 includes all of the features of
the GTN 725 in addition to an airborne VHF communications transceiver and airborne VOR/localizer
(LOC) and glideslope (G/S) receivers. The GTN 725 and 750 also have the ability to remotely control
GMA 35 audio panel functions.
2.1.1.3 GMA 35 Audio Panel
The GMA 35 audio panel is both a marker beacon receiver and an audio panel with 6-place intercom that
interfaces to the communications and navigation radios, headsets, microphones, and speakers. The
GMA 35 is remote-mounted and relies upon the GTN 725 or GTN 750 to control and display the audio
functions.
The GMA 35 interfaces to the GTN 7XX through RS-232 for control and display of audio panel functions.
Additionally, the GMA 35 includes a six-position intercom system (ICS) with electronic cabin noise de-
emphasis, two stereo music inputs, and independent pilot, copilot, and passenger volume controls. The
intercom provides three selectable isolation modes. A pilot-selectable cabin speaker output can be used to
listen to the selected aircraft radios or to broadcast PA announcements.
2.1.1.4 Flight Stream 210
The Flight Stream 210 brings Bluetooth
®
connectivity to the cockpit, allowing portable electronics to
stream data to and from the installed avionics.
The Flight Stream 210 interfaces to the GTN 6XX/7XX (Flight Stream supports connection to one
navigator at a time) through RS-232 for attitude information, flight plan information, and GPS PVT and
displays that information on a portable electronic device (PED). The Flight Stream may interface to the
GDL 88 through RS-422 and the GDL 69 through RS-232 as well.