"kevmor" wrote in message
ups.com...
I flew today to try out some more approaches with the KLN94 and the
entire time I was getting "Altitude Fail" in the MSG area, which the
manual says will display "When the altitude input becomes invalid
during operation". If I remember correctly, I think I saw when
turning it on or setting the ALT that it wasn't receiving any altitude
input, so I pushed ALT and set the altimeter to the current setting.
It kept redisplaying though... am I doing something wrong, or is it
getting a bad input possibly?

You do have either an encoding altimeter or blind encoder and it is hooked
up to the GPS and is functioning properly? You have your transponder turned
to ALT and not just to on? If the GPS is not hooked up to the encoder there
should be a way in the setup to tell it there is no encoder connected. I am
not familiar with the KLN94 but these things are pretty common to all panel
mount GPS.