It looks like the hinge joint attached to the stab came loose from the stab; it looks like the fitting is complete and attached to the elevator fragment - anyone got a manual to see if it is held on with bolts? Also possible - the fitting fractured through the rearmost of two fasteners which would leave the hinge attached to the elevator, but with only a stub instead of the entire stab-side hinge half. The photos are too blurry to make out which. If the former why did the fasteners come loose, if the latter what triggered the fracture, and behind door number 3, is there some other possibility?
I'm interest to know how the pilots came to believe that only right hand turns were acceptable and if they would actually have been a problem.