Northwest Orient Airlines Flight 706Sunday September 17, 1961
Takeoff and Initial climb appeared to be normal, but at approximately 200 feet a shallow turn to the right continued into a gradually increasing bank of about 85 to 90 degrees. While in the turn, the crew made a short, garbled transmission indicating alarm. During the latter part of the turn a gradual descent began and, two minutes after taking off, the aircraft struck the ground. Mechanical failure in the aileron primary control system due to an improper replacement of the aileron boost assembly, resulting in a loss of lateral control of the aircraft at an altitude too low to effect recovery.