What: United Airlines en route to San Francisco
When: April 17, 2011
Why: After takeoff, the autopilot took control and would not relinquish it. The pilot had no control over the plane, but then was able to turn off autopilot and return to the airport.
The news release of this event does not mention the type of plane; but I am not surprised at first research that it appears to have been an Airbus A320. Fortunately, the pilot regained control, and there were no injuries. But this kind of problem with an airbus could have significance relating to all fly by wire aircraft, which have the capacity to lock out the pilot.
We need more information about this event. It should be published heavily, and we should be hearing some alerts and safety directives from Airbus.