Gdu 620; Gdc 74A - Garmin G500 Pilot's Manual

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.
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.
190-01102-02 Rev. B
Figure 1-2 GDU 620 PFD and MFD
Figure 1-3 GDC 74A Air Data Computer
Garmin G500 Pilot's Guide
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