A few? That’s not good enough for me.If your readouts are within a few psi of an accurate gauge, why even worry about it ?
Yes, indeed. The valve has nothing to do with the TPMS.A little off topic, but does anyone know if the valve stem insert for the TPMS is the same as a standard valve stem?
I asked my brother who’s a pilot if he checks the planes tire pressure, he said no, they have mechanics that do that.I'd also submit that in 7500+ flight hours I have never checked tire pressures on any airplane, including those I've managed...as nitrogen should be used in aircraft tires.
My brother seems to echo your statement.I never once put tire pressure gauge to valve stem on a piston Cessna or Piper or Cirrus as a student or flight instructor or professional pilot, from C150 through PA34, as that was not part of the POH/AFM preflight procedure. If a tire looks low, you notify maintenance and let them check/service tires.