On 25 May 2010 a United Airlines Boeing 777-200, registration N794UA performing flight UA-935 from London Heathrow, EN (UK) to Los Angeles, CA (USA) with 196 passengers and 15 crew, was enroute at FL330 overhead the Labrador Sea just about to reach the mouth of the Hudson Strait (Canada), when the crew reported the airplane had encountered an in-flight upset causing injuries.
The crew climbed to FL360 and set course to divert to Chicago O'Hare, IL (USA) in about 1400nm distance, but then turned towards Montreal, QC (Canada) some 950nm from the point of diversion. About 130 minutes after the diversion the airplane landed safely in Montreal, where 5 ambulances met the aircraft to take care of 6 injured people. In addition to the physical injuries, there was significant psychological trauma for the passengers.
Although the airline is blaming this incident on turbulence, the Irwin Mitchell Aviation Law Team are also investigating the Boeing 777 fly by wire and autopilot systems, as problems these systems on Boeing and Airbus aircraft have previously caused serious in flight upsets/ loss of control.