Huck, Lederhosen,
thanks for the confirmation; and I don't want to speculate any further. The accident happened, the result is here, tragic as it is.
Based on Huck's info I hope that there was no human error involved.
Based on Regulatory I hope it was not the machine's fault.
Based on experience with load masters I hope it was not the load masters fault either.
Just on a side note: outfits create their SOP's based on manufacturer's recommendations. I haven't seen many outfits with their SOP's outside manufacturers specs. So I would safely assume the SOP's were, bluntly said, OK.