Originally Posted by
mack44
G'day Hot and Hi,
Check if there is a leak in the MAP gauge line coming from engine to gauge. I also once had a discrepancy with Map gauge and altimeter reading different ambient, caused by some solder left in gauge at time of manufacture.
Cheers Mack.
I second this, we had a Raven II, which at 102% before takeoff, collective fully down, was reading 18"MAP when I should have been reading 14" at our density altitudes. Therefore artificially limiting the power available. It was a problem to do with one of the pressure lines to the MAP gauge.