Lyman re your post of not reacting to Stall Stall.
A lot of years ago I was involved in an investigation into a wheels up arrival.
The GPWS was triggering for 17 seconds. None of the 3 crew heard it. However it was as clear as a bell on the CVR area mike. 1st thing to go under stress is hearing so I guess the 447 didn't hear the stall warning.