Thread: Trig TT21 Transponder receives FAA TSO approval
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Old September 19th 09, 12:18 AM posted to rec.aviation.soaring
jcarlyle
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Default Trig TT21 Transponder receives FAA TSO approval
Tim, this statement does not jibe with what Trig told me in writing.
What is your source?

-John

Tim Mara wrote:
any of the TRIG Transponders here in the USA "at this time are non-TSO' d"