An American Airlines passenger was taken to hospital after severe turbulence caused a 4-hour flight …

• An American Airlines flight returned to São Paulo after turbulence injured a passenger.

• The airline said there were more than 200 people on board, and the seatbelt sign was on.

• Several carriers have changed protocols because of rising concerns about turbulence.

An American Airlines passenger was taken to hospital after their flight encountered turbulence.

Data from Flightradar24 shows that Saturday’s Flight 930 from São…