Mike,
Thanks for the reminder...
Fortunately everything is still under new aircraft warranty. Will check
papers to see kind of blind encoder feeding the transponder.
Gene


"Mike Rapoport" wrote in message
nk.net...
Why do you think that it is your altimeter? Does it match field elevation
with the current altimeter setting?

Mike
MU-2


"Gene Whitt" wrote in message
k.net...
Y'all,
I have been flying in an aircraft where ATC has occasionally mentioned
that there is a 3-4 hundred discrepancy betwee our
communicated altitudes and that of our blind encoder. We have
acknowledged the difference.

The altimeters were certified some 300 miles away only three months ago.

ATC has accepted continuation of our flights using our indicated
altitudes not those of the blind encoder. The transponder altituded
gives encoder altitudes..

What do the FARs require?
What are the options?
What warranty on altimeter work and for how long?
Opinions wanted.

Gene Whitt