"Wyatt Emmerich" wrote in
news
The altimeter readings were all correct on the flight. The transponder
reported accurately and center never had a problem with my altitude.
So it seems to me, the static system must be correct.

A loose connection in the ram air system could give erroneous airspeed
readings while giving correct altimeter readings, as could a partial
obstruction. I've seen water in the pitot system give this error also,
which is really a partial obstruction.

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Regards,

Stan