Gdu 620; Air Data Computer (Adc) - Garmin G500H Pilot's Manual

Each LRU has a particular function, or set of functions, that contributes to the
system' s operation.
1.1.1.1

GDU 620

The GDU 620 has dual VGA (640 x 480 pixels) 6.5 inch LCD displays. The
right side of the GDU is a PFD and the left side is the MFD. In some models or
installations, the PFD and MFD and their controls are switched to the other side.
The MFD shows a moving map, flight plan, weather, and other supplemental
data. The PFD shows primary flight information, in place of traditional pitot-
static and gyroscopic systems and also provides an HSI for navigation.
1.1.1.2

Air Data Computer (ADC)

The Air Data Computer (ADC) compiles information from the pitot/static
system and an Outside Air Temperature (OAT) sensor. The ADC provides
pressure altitude, airspeed, vertical speed, and OAT information to the G500H
system. The ADC communicates with the GDU 620 and AHRS using an ARINC
429 digital interface.
190-01150-02 Rev. J
Figure 1-2 GDU 620 PFD and MFD
Figure 1-3 Air Data Computer
Garmin G500H Pilot's Guide
1-3