@ Hotel Tango
Yes, but do we know for sure that the turn was intended?
If the right wing clouted that black structure, whatever it is, the damage to slats, flaps or aileron might well have rendered the turn uncontrollable. Looking at the video it appears the initial turn to the right is relatively gentle but steepens as the aircraft turns through 180 degrees, at which point it appears to me the aircraft stalls and drops its right wing further. Perhaps trading speed for height stalled the damaged wing at a higher airspeed than expected, rather like the Chicago DC-10.
Or, the engine that burped finally failed, and at that speed and weight, and with flap damage, etc., the 727 could no longer be kept flying.
Not that there would seem to be a lot to learn from this event, mind. Yes, it does appear that Aerosucre takeoffs were a spectator sport, and given the proliferation of 'exciting' Aerosucre takeoff videos on YouTube and elsewhere, operating right on the edge of the envelope with no margin for error or unexpected performance loss appears to be normal for these chaps - the normalisation of deviation, indeed. Well, if you're going to push your luck like that, eventually something like this will happen.
Thanks for the translations, BTW.