XL Airways A320, 2 of 3 AOA sensors froze.
The values of the n° 1 and 2 local angles of attack recorded by the SSFDR remained fixed from FL 320 until the impact with the surface of the sea. It was not possible to determine the evolution of the value of the n° 3 local angle of attack in the course of the flight, which is not recorded. The initiation of the stall warning, however, shows that angle of attack sensor n° 3 was working at the end of the flight.