Bournemouth Avionics on Twitter: "Garmin Install: GMA342, GNC255A AND GTX335 IN! Installed in a PA28. Removed: Bendix King KMA20 audio panel, Bendix King KX175B Radio and a Bendix King KT76A. Installed: Garmin
Old School - www.AvionixHelp.com
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Pilot Controls - gnc 255a nav | Garmin GNC 255 | GNC255A/255B Pilot's Guide (Page 14)
Garmin VHF Nav / COM Radio GNC 255A / 255B For Experimental Aircraft | Aircraft Spruce Canada