Originally Posted by
Bidule
I do not think this is a correct statement, at least in FAR 25. Effectively, as per FAR25.207(c): "Once initiated, stall warning must continue until the angle of attack is reduced to approximately that at which stall warning began."
The wording is a bit different but the idea is the same.
Thanks for digging that out.
In the case of AF447, the stall warning stopped even though the angle of attack had increased way further than stall warning aoa.
This is in contradiction with the abovementionned statement.
Even if Airbus was authorized to design it like that, this can be criticized.
Mono : thanks for this info.
However, a better idea than a below 60kt condition for deactivation would have been a weight on wheel condition.
If you're in flight below 60kt with your airbus, you're almost 100% sure that you're stalling (or in 0G flight but that seems unlikely) so I think it would deserve to ring..
Aoa is not reliable under 60kt ? if you stall so deeply that your CAS goes under 60kt, that's a very good reason to make the stall warning ring. Not stop it.
(if no weight on wheels)