An American Airlines Boeing 737-800, performing flight from San Jose (Costa Rica) to Miami (USA), experienced severe turbulence which injured flight attendant.

• Aircraft was enroute at FL380 when the aircraft encountered severe turbulence causing a serious injury to a flight attendant.
• The aircraft continued for a safe landing on Miami’s runway 08R. The flight attendant was taken to a hospital.
• The FAA reported the flight attendant sustained a fractured ankle.