A second effort to illustrate a possible interpretation of HS separation. I understand this possibility is contentious/debatable and, as with my previous suggestion that the HS assembly went 'straight out the back' as a result of near 90 degree breaking off the APU section completely as it went, some evidence appears to fit, some doesn't. For simplicity's sake I have ignored movement of the elevator relative to the HS in the diagram.
And as ever, irrespective of the plausibility of this scenario, the initiating factor remains unclear.
