For the Thales AoA sensor to protect from ice accretion to the protruding (non heated) base.
For the Goodrich AoA sensor to protect from water ingression in outer bearing. (Perpignan accident)
Thales conical plate installation, on top the original flat plate.
below Goodrich AoA sensor (plate not shown) , Conical plate and an image from the Bea final perpignan report.
