Let me pre-empt this with while I'm a cargo driver, the heaviest thing I flew was a 1900D, and I only fly cargo in a caravan, to this, my experience is and my expertise will remain limited to.
I learned from a friend of mine that was getting typed in a KA350 that even in straight wings, with an uncontrollable pitch up (trim runaway, elev/flight control mal, etc) that rolling over past 45 degrees did exactly what was mentioned, about preventing a high nose attitude that would have induced a stall. He said it was important to recognize before the airspeed got too low, so ailerons remained effective and allowed altitude control while diagnosing the problem.
In my experience, I bet if I had a bunch of boxes in my caravan that slid back on me during take off roll that my nose would pitch up before Vr because of the added tail down force the aft cg creates, not unlike having too many skydivers hanging out the back door or rush to the back of said caravan too quickly. In this situation as the aircraft left the ground, I think I would commit to an airborne problem rather than chopping power and trying to get it back on the ground. As I remember in training, that's why I would give a pre-takeoff brief that included "....after Vr and rotation, any emergency will become an airborne emergency and dealt with airborne, I fly, you fix, etc. . . . . ." Those take off briefs weren't for my mental health, they helped me become prepared for what to do.... in an emergency.
I can appreciate the light this very sad event brings to how I do my job to protect myself so I can go home and see my wife every night. Whatever the case, this will be a reminder for me to remember, "don't get lazy, check my straps, and did the loaders secure them correctly, is my net in good shape and used properly? Are the D rings secure in the floor? Have I adhered to company and manufacturer policies? Have I done everything to prevent an accident today so that I can take my wife out to dinner tonight?"
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