Overview
On November 23, 2015, at 1500 Atlantic Standard Time, American Airlines flight 825, an Airbus A319 (registration N725UW), encountered severe turbulence while in cruise from LF Wade International Airport (BDA), Hamilton, Bermuda, to Philadelphia International Airport (PHL), Philadelphia, Pennsylvania.
Flight Sequence
Prior to departure, the flight crew had flown the previous outbound flight from Philadelphia to Bermuda at FL390, during which they experienced continuous light to occasional moderate turbulence. Before the return flight, the captain conferred with the dispatcher, who suggested FL280 for a smoother ride. The flight departed BDA and climbed uneventfully to FL280.
During cruise, the flight crew requested and received approval for a slight course deviation to avoid some showers. After turning back on course, the aircraft was clear of convective activity and experiencing a smooth ride.
Turbulence Encounter
Suddenly, the flight encountered what the crew described as "severe" turbulence that lasted 5 to 10 seconds. At the time of the event, the airplane was on autopilot and the seatbelt sign was not illuminated.
Injuries and Damage
When the turbulence was encountered, flight attendants were thrown to the floor, resulting in one suffering a broken ankle. One passenger also experienced a minor injury. There was no damage to the airplane.