GTN 625/635/650 TSO Installation Manual Page 1-1190-01004-02 Rev. C1. GENERAL DESCRIPTION1.1 IntroductionThis manual is applicable for units with main software version 2.00 or later. This manual describes thephysical, mechanical, and electrical characteristics, as well as instructions and other conditions andlimitations for installation and approval of the GTN units. Refer to Section 2, Limitations, for additionalinformation and other considerations.NOTEExcept where specifically noted, references made to GTN will equally apply to theGTN 625, GTN 635, and GTN 650. All screen shots used in this document are current atthe time of publication. Screen shots are intended to provide visual reference only. Allinformation depicted in screen shots, including software file names, versions, and partnumbers, is subject to change and may not be up to date.Table 1-1. GTN UnitsModel Part Number ColorGTN 625 010-00811-00 BLACKGTN 635 010-00812-00 BLACKGTN 650 010-00813-00 BLACK010-00889-00 GRAY1.2 Equipment DescriptionThe GTN 625 is a GPS/SBAS unit and may be approved for IFR en route, terminal, non-precision, andprecision approach operations. The GTN 625 meets the requirements of the TSO specified in Table 1-4.The GTN 635 includes all of the features of the GTN 625 in addition to an airborne VHF communicationstransceiver. The GTN 635 meets the requirements of the TSO specified in Table 1-4.The GTN 650 includes all of the features of the GTN 625 in addition to an airborne VHF communicationstransceiver and airborne VOR/localizer (LOC) and glideslope (G/S) receivers. The GTN 650 meets therequirements of the TSO specified in Table 1-4.CAUTIONThe GTN has a display that is coated with a special anti-reflective coating that is verysensitive to waxes and abrasive cleaners. CLEANERS CONTAINING AMMONIAWILL HARM THE ANTI-REFLECTIVE COATING. It is very important to clean thedisplay using a clean, lint-free cloth and an eyeglass lens cleaner that is specified as safefor anti-reflective coatings.CAUTIONThe use of ground-based cellular telephones while aircraft are airborne is prohibited byFCC rules. Due to potential interference with onboard systems, the use of ground-basedcell phones while the aircraft is on the ground is subject to FAA regulation 14CFR §91.21. FCC regulation 47 CFR §22.925 prohibits airborne operation of ground-based cellular telephones installed in or carried aboard aircraft. Ground-based cellulartelephones must not be operated while aircraft are off the ground. When any aircraftleaves the ground, all ground-based cellular telephones on board that aircraft must beturned off. Ground-based cell phones that are on, even in a monitoring state, can disruptGPS/SBAS performance.
