January 1, 2007, Walden, Colo., Piper PA-34-200T Seneca II
The airplane was in cruise flight at 12,500 feet when the pilot disengaged the autopilot to maneuver over mountains. Shortly, the airplane began banking uncontrollably; the pilot steadied the airplane with rudder. The flight controls were difficult to manipulate, a difficulty that grew in intensity as airspeed was reduced.