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- Aug 24, 2020
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What does it take to upgrade from the GTX 335 transponder to the 345? No integrated GPS, not remote mounted. Basically I want to go from ADSB out to ADSB In/Out. Is it just a slide out and slide in replacement? In which case any A&P should be able to do (I mean I could but FAA paperwork...yeah) or does it require an additional atenenna. The units llook about the same size so I assume the tray is the same.
