dual input
Narval,
I beg to differ on your comment regarding the lack of dual input alarm on AF 447 that night.
If you go back to the CVR transcript in the #3 report, you'll find that the synthetic voice stated "DUAL INPUT" on five occurences : 2:13:23, 2:13:41, 2:13:43, 2:13:45 and 2:13:47.