Mark...

Sorry to miss you at Oshkosh this year. It is always a pleasure to see you
again. The intercom business has never been better, thanks for asking.

My advice stands. TSO is not required for part 91 aircraft, and
notwithstanding your requirement for auxiliary (sp correct) jacks, your
"approved data" is not required.

Again, TSO for part 91 aircraft is NOT required, nor are hardwired jacks.

If you have made your manufacturer's data required for all certificated (sp
correct) aircraft, then you have placed an additional burden on those part
91 aircraft owners that is not required by the regulations.

A bypass switch really is the clever way to provide redundancy rather than
requiring the aircraft owner to drill, install, and wire jacks that they may
or may not have room for on the aircraft panel. I'd much rather depend on a
single switch than extra jacks and wire.

Jim



wrote in message
oups.com...
Hello Jim!

It's been a while! I didn't get a chance to see you at Oshkosh this
year, it was a short visit for me.

Hope you are doing well and that the intercom business is treating you
well.

I would like to let you know that the answer to the question of the
original poster would actually be yes, if he was installing one of our
FAA TSO'd intercoms. The reason? Because these Auxillary Mic and
Headphone jacks are listed as a requirement in our approved data,
(Install Manual) when installed in a certified aircraft.

Home built, you are correct, but installations in certified aircraft,
our approved intercoms must be installed in accordance with our
approved data. Remember, manuals are part of the TSO'd approved data.

Anyway, just thought I'd throw my 2 cents in.

Take care Jim.
Mark