Lonewolf 50
I don’t recall the drill exactly, but AoA can be calculated on the A330 using fpv (the “bird”). “Flight Path Vector” in the FD. ACARS recorded a crew attempt to disable the Computer PrimSEC 1. This would have allowed the FPV to appear, then some mental math subtracting bird from AH.
This explains the crew fiddling with the FDs, turning them on, when they were prohibited by the book.
It led to some harsh criticism of the crew, “trying to fly the FD”. They weren’t looking for airdata, but AoA. Wouldn’t we all?
as I recall