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Trig adds Garmin compatibility, expands AML STCTrig adds Garmin compatibility, expands AML STC

Increase TT31’s ADS-B compatibilityIncrease TT31’s ADS-B compatibility

Trig's TT31 1090ES transponder

Trig Avionics announced a significant expansion of its FAA supplemental type certificate program for the company’s TT31, a Mode S transponder with extended squitter capability that allows it to be used for Automatic Dependent Surveillance-Broadcast Out (ADS-B Out), at EAA AirVenture on July 22. The FAA is requiring ADS-B Out capability beginning Jan. 1, 2020, in order to fly in airspace where a transponder is required today.

“I am pleased to share that our FAA ADS-B STC program now includes all Garmin GTN navigators,” said Andy Davis, Trig CEO. “Aircraft owners can maximize the value of a TT31 by integrating it [with a Garmin navigator that can serve as the WAAS position source required for ADS-B]. Our TT31 now has support for practically all of the navigators commonly found in owners’ airplanes.”

A TT31 transponder will fit in a Bendix/King KT76A or KT78A tray, and the same antenna normally can be used; only a connection to a Garmin GTN navigator, or a WAAS-capable GNS 430 or GNS 530, is required, Davis said. “We prove that many KT76A and KT78A customers can benefit from a stress-free install, avoiding additional antennas or physical changes to the panel. Our free STC program via our STC partner Peregrine of Denver makes this process even more straightforward.”

In addition, Davis announced that the list of approved aircraft for Trig’s approved model list supplemental type certificate has been expanded to nearly 600 models. “In test flights the TT31 and GTN produced exceptionally solid ADS-B data,” said Dave Rankin, Peregrine’s CEO. “FAA flight reports showed very reliable and consistent performance.

“We’ve been working with Trig for the past four years on obtaining and expanding these STCs,” he continued. “The great part of these projects is you get to do a lot of flying.” The process begins with an engineering analysis, ground testing, and then flight testing. Only select models receive the full flight test; other models with similar characteristics then can be added through an engineering analysis. “We’ve been through it several times now. I think we’ve got a very nice cross-section of manufacturers and aircraft.”

About 600 aircraft models are now listed on Trig’s AML STC for the TT31 panel-mount transponder. The STC for the remote-mount TT-22 should expand soon to 350 aircraft, and eventually will cover the same models as the TT31, Davis said.

He also said that Trig’s new TY96 and TY97 communication radios, and TMA44 and TMA45 audio panels—which were announced at the Aircraft Electronics Association convention in April, will be shipping to dealers at the end of this year.

Mike Collins

Mike Collins

Technical Editor
Mike Collins has worked for AOPA’s media network since 1994. He holds a private pilot certificate with an instrument rating.
Topics: Events, EAA AirVenture, Avionics

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