Buying the new airborne (OEM) is $883.55. Anyone know the legality & fit of
replacing it with a UMA version?

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"CriticalMass" wrote in message
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Sounds like it's tired.

Any instrument shop could overhaul it, I suppose - Trade a Plane is full
of them. I'd look at cost new, as well. Aircraft Spruce shows a 2 1/4"
UMA vacuum gauge new for $84.

I always say, replace stuff in our old airplanes with new every 35-40
years whether it needs it or not.