What really intrigues me is that the B200 could not manage to stagger out to a safe altitude with both engines seemingly operating normally, no matter how radical the sideslip was.
I think this accident demonstrates just how detrimental gross sideslip can be, lucille. Take a look at figure 20 on page 25 of the report. Positions 5 and 6 show the aircraft appears to be going almost sideways. You will have to zoom in on the image.
The report doesn't explicitly say so, but reading between the lines, they seem to be saying that, prior to the 34s mark, the pilot was managing the yaw and the aircraft was climbing and accelerating, but at 34 seconds, his leg "gave out". The sideslip then rapidly increased to 30-40 degrees, the acceleration ceased and the climb turned into a descent. Refer figure 22, page 28.