@ rudderrudderrat : My pleasure
Regarding your comment:
Originally Posted by
rudderrudderrat
AB designed a system which removed both the stall warning and the FPV when IAS<60 kts.
What a wonderful system.
The thing is AoA probes (needed for stall warning & FPV) are (or deemed) unreliable when IAS<60 kts. I'm not sure an unreliable FPV and/or stall warning is better than none at all?
About the PFV: if I read correctly the annex 4 (parameters) of the 3rd interim report, HDG-V/S was selected on AF447, never was TRK-FPA asked by the crew. Therefore, the unavailability of the bird, although damageable in absolute terms, would have changed nothing in the case of AF447.