Mark1234
I posted a theory earlier that presumed Tab failure causation. This is all conjectural, and if it reads a little too conclusively, my bad.
Earlier on, prior to the snap left, a slight roll is seen to the right. This could result from the loss of Trim Integrity on the left side, as the Tail twisted rightward. This torsion would oil can the fuse in the manner seen, whether the photo is concurrent the upset or no.
The reaction of the pilot would be to roll left, and without knowing his Roll datum, in the circuit, it is not possible to index pilot input from here on.
With an ineffective Tab (it was still attached) and its drag, it wouldn't cause the LOC on its own, imo. But it would certainly instigate some input from Leeward, and well, no one I know has ever been there.......
regards, Bill