Originally Posted by
Winnerhofer
Not recommended is not the same as Prohibited.
Worth a go!
I wonder if BUSS has been tested inflight above FL250.
The reason it is not recommended is explained by HN39 here (emphasis mine):
Originally Posted by
HazelNuts39
The BUSS, if fitted, must not be used above FL250. The main reason for that is that the back-up stall warning threshold does not change with Mach number and the selected value of 8.6 degrees is too high above FL250.
So all things considered, probably *not* "worth a go"! I don't want to drag this thread into more AF447 discussion, so if you want to take it up on the AF447 thread, go for it.
