Ron Natalie wrote:


Did I say SQUAT about vertical guidance. It is a requirement for
TSO-C129a CERTIFICATION. I didn't say what it was used for.
My statement appears to still hold true.

ARRGGGHHH!!!..

You are ABSOLUTELY CORRECT. The altitude source must be connected in
order to have an IFR certified installation. It even states as such in
my King KLN-89B installation manual. I missed those 2 sentences previously.

The irony of it is, I've got the wires installed for it on mine, even
though the only discernable function is the altitude alert, which I'm
not sure I'm going to use.

Thanks Ron.. I was wrong and you were right.