Originally Posted by
wiedehopf
I wouldn't call it the same problem. The problem before was the AoA signal intermittently being missing, causing the loss of air data on the captains side.
After the AoA replacement the problem was a constant offset, i would call that a different error.
Anyway it wasn't two AoA vanes with the constant offset.
It could be that neither AoA vane is at fault and maybe just the installation triggered another problem causing the constant offset.
Could it be there was some calibration process that was overlooked?
Is the AOA sensor manufactured to output a standard analog voltage output at a given angle of deflection (so, you don't need calibration),
Or does each new installation of AOA sensor installed and then the system is calibrated to interpret the AOA voltage?
Any maintenance engineers here to confirm the steps taken?