Diversification;
You wrote:
In case there are three AoA units their data are treated in the same way.
The ATSB wrote:
In addition, for ADIRU parameters except for AOA, when all three values were valid, the median value was used for calculating the flight control commands.
And in the next paragraph:
There was a potential for the AOA sensors on the right side of the aircraft (AOA 2 and AOA 3) to provide different values to the AOA sensor on the left side of the aircraft (AOA 1) in some situations due to aircraft sideslip. In order to minimise the potential effect of this difference, the PRIMs used different processes for AOA compared with other parameters when determining the value to use for calculating flight control commands. More specifically,...
regards,
HN39