Figure 2-6 - Gad 29B (Arinc 429 Adapter) - Garmin G3X Touch Maintenance Manual

Figure 2-5 – GTP 59
2.1.6 GAD 29B ARINC 429 Adapter (Optional)
The GAD 29B allows the G3X system to interface to IFR GPS navigators such as the Garmin GPS 175,
GNX 375, GNS and GTN series. It also allows for interface to some non-Garmin autopilots.
Figure 2-6 – GAD 29B (ARINC 429 Adapter)
2.1.7 GAD 27 Electronic Adapter Unit
The GAD 27 provides a stabilized 12V power output to keep EIS online during engine start when battery
voltage drops. It is installed on airplanes with a 14-volt electrical system that install the G3X EIS option. It
may be installed on aircraft with a 14-volt electrical system that do not have EIS to prevent reboot during
temporary low battery voltage levels. Refer to Appendix A.1 for installed equipment. GAD 27 is not
installed in aircraft with 28-Volt electrical systems.
If a GAD 27 is not installed on 14-Volt aircraft and a PFD/MFD reboot is observed, troubleshoot the
aircraft per guidance in Section 5.3.5.
Maintenance Manual 190-02472-02
G3X Touch EFIS Part 23 AML STC Revision 2
Page 11