Hi,
2nd edit jcjeant post #598, interesting link. If indeed BUSS was a good thing, yet again, like AF skimping costs by not installing GPWS and the resulting A320 crash in Strasbourg, the bean counters should be ahead of the pilots, when we attribute blame.
Yes .. bean counters ...
To notice that the "BUSS" from AF statement not work well over level 250
Well ... the AF447 had about two minutes before reaching sea water when passing level 250
Methink it was maybe enough time to apply useful corrections .. if AC had a BUSS
Results may varies ....