The company I work for recently include flap failures as part of our loft excercise. With a demonstration of
flight with assymetric flap!
We started with flap 1 on on side with 0 on the other
by the time the flaps got to 2 the aircraft(sim)
Was untrolable and would have ended in cotastorphy,
No doubt this is why the manufactures have
this protection bult in.
In addition I worked for a company that had EMB 145
One aircraft had a hyd failure. Should be no
major problem. But he crew used the speed brake to decend. The speed brake is held in using Hyd psi
so they had a floating speed brake on
approach, I think the check list was changed after
this occurance. ie not to use speed brak under this situation.