The Patna 737 was heavily into the stall buffet as a result of levelling (and subsequent speed dissipation) during an impromptu 360 turn on finals. I think it was also configured at the time. You do tend to get a bit of autorotative wing-rock at the stall - so I doubt that rudder hard-overs had anything to do with this accident.
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Who knows what evil lurks in the hearts of men?