Originally Posted by rudderrudderrat
The crew had no idea that they were about to run out of aileron authority when (seite 63) "The aircraft was designed so that the effect of lateral controls (along the longitudinal axis) would reduce by about one half of full deflection as soon as one main landing gear touched down."
The aircraft behaves one way then the next second it's a different aircraft. Not what pilots expect, especially when such characteristic is not even mentioned in the documentation.