HN39,
An engineer will correct me if I'm wrong but this is what I think :
As soon as the aircraft is back on the ground, the PFR (Post Flight Report) will tell that one ADR has been rejected and the report should mention the reason why that ADR has been rejected : In this case one AoA sensor was disagreeing with the 2 others. (A normal operation flight would have also triggered the rejection of one ADR) Now, it depends how far the engineer wants to investigate : He can test the system, see no fault and sign the aircraft ready for flight, or it must be possible (?) for him to extract the data of AoA sensors 1 and 2 (3 not being recorded) and analyze those data in more details ...