Thanks, agb.
So after the Air Caraibe incidents in August/September 2008 there was talk of modifiyng the checklists and procedures for the unreliable airspeed (UAS) indication case.
In
AF447 AIT 1 and 2, nine months later on 1st and 4th June 2009, Airbus has acknowledged the indication of an unreliable airspeed situation on AF447 (from the ACARS data) and reminded operators to follow the relevant checklists and procedures.
Then in AF447 AIT 7 a few days ago (the "Figaro" AIT) Airbus says there is no immediate cause of concern now.
From this we might infer that either (i) Airbus have concluded that the UAS checklists and procedures are okay, despite the concerns risen from the Air Caraibe incidents. Or then (ii), the UAS procedures and checklists have been revised in the meantime. It would be interesting to know the contents of AIT 3 to 6. The third (iii) scenario is that Airbus considers the pitot tube replacement (and/or with associated changes to the warnings and ECAM) to be a sufficient remedy to the UAS handling problem.
Am I totally on the wrong track?