G900X/G950 Installation and Maintenance Manual – GDC 74A Page 6-5190-00719-00 Revision D6.4.2 TSO/ETSO Deviations for the GTP 59The following deviations have been requested and granted for the GTP 59:Table 6-6. GTP 59 TSO/ETSO DeviationsTSO/ETSO Deviation1. Garmin was granted a deviation from TSO-C106 to use RTCA DO-160D.TSO-C1062. Garmin was granted a deviation from TSO-C106 to use Society of AutomotiveEngineers (SAE) AS 8002 Rev A.ETSO-C106 3. Garmin was granted a deviation from ETSO-C106 to use Society of AutomotiveEngineers (SAE) AS 8002 Rev A instead of SAE AS 8002.6.4.3 Continued AirworthinessMaintenance of the GDC 74A and GTP 59 is “on condition” only.6.5 Installation Requirements6.5.1 Available EquipmentTable 6-7 contains a list of the available accessories for the GDC 74A.Table 6-7. GDC 74A AccessoriesItem Garmin Part NumberGTP 59 OAT Probe Kit 011-00978-00Sub-Assy, Conn Kit, SB, GDC 74A 011-01010-01Remote Mounting Rack, GDC 74A 011-01011-00Adapter Plate, GDC 74A 011-01014-00Rack Nutplate Kit, 2 pos. GDC 74A 011-00915-00