I'm confused, did the transponder quit working just because the 24 month
checkup is up??? If it was working, who's going to know that it hasn't
been
checked?

Precisely my point. Unless the original poster has some new device that
disables his transponder at 24 months, he can fly it forever, and who the
heck would know?

And, unless he's flying IFR, who the heck would care?

Trust me -- ATC will let you know if your transponder isn't working.
(Heck, they got to know us well, before we finally replaced ours. "Oh, it's
you guys again. Third digit still not working?")
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"