Our latest completed project in a Piper PA28-140 includes a GMA345 audio panel, GTN650Xi COM/NAV/GPS with FS510 WiFi/Bluetooth module, GFC500 pitch/roll autopilot and dual Garmin GI275 ADAHRS units with internal battery backup in both units. The existing King KT74 transponder was connected to the GTN650Xi for ADS-B out. The latest revision of the GI275 EASA STC’s allows that all analogue instruments may be removed (except the magnetic swing compass).
