Garmin G500 Pilots Guide - Page 19

Foreword 1.1.2 GDU 620 The GDU 620 has dual VGA (640 x 480 pixels) 6.5 inch LCD displays. The left side of the GDU is a PFD and the right side is the MFD. The MFD shows a moving map, flight plan, weather, and more. The PFD shows primary flight information, in place of traditional pitot-static and gyroscopic systems and also provides an HSI for navigation. Sec 1 System Sec 2 PFD Sec 3 MFD Sec 4 Hazard Avoidance Features Sec 5 Additional Sec 6 Annun. & Alerts Sec 7 Symbols Sec 8 Glossary Appendix A Figure 1-2 GDU 620 PFD and MFD 1.1.3 GDC 74A The GDC 74A Air Data Computer (ADC) compiles information from the pitot/static system and an Outside Air Temperature (OAT) sensor. The GDC 74A provides pressure altitude, airspeed, vertical speed, and OAT information to the G500 system. The GDC 74A communicates with the GDU 620 and GRS 77 using an ARINC 429 digital interface. Figure 1-3 GDC 74A Air Data Computer 190-01102-02 Rev. B Garmin G500 Pilot's Guide 1-3 Appendix B Index