It looks to me more like an abandoned truck cabin and not a part of any wall. Any brick wall would have taken the whole wing off. At any rate, the right inner trail edge flap was gone after taking off which induced a right turn due to the asymmetry of lift forces. The B722 was still an old steamer and I can bet nobody in the cockpit put together the lost of the flap (especially in a cargo plane with no windows) but they did the come back to the airport and try for an emergency landing fast. The trap was set. If they have known they would have used the rudder to compensate for the flap lost, gain more altitude and try for a belly landing without resetting the flaps. All in hindsight off course with a big maybe.
Cheers