RG, by the time of the steep right wing down, the outcome was probably no longer in doubt due to lack of altitude for recovery. (EDIT: sorry, TorqueTonight already made that point. )
(IIRC,
BOAC observed a few pages back that with internal cargo moving about it's a whole different problem).
You may find
the NASA paper hval linked to of interest, as it addresses stability and internal CG shift when there is a flight control malfunction. Not directly related, but maybe linked to your question in terms of influence on lateral stability.