Trig Avionics transponder gets FAA nod

Trig Avionics has received FAA STC approval of its TT31 transponder with Garmin’s GNS 400W and 500W series of GPS navigators.

Trig’s TT31 transponder is a plug and play retro-fit for the KT76A and KT78A — and it’s also ADS-B Out capable too, according to company officials.

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