SAFETY
Study Adds Data on Control in Turbulence
(This is the second part of a Civil Aeronautics Board accident investigation into the crash of a Northwest Airlines Boeing 720B on Feb. 12, 1963.) When questions arose regarding the possibility of making a successful recovery from a vertical dive below 20,000 ft., Boeing provided the Board in November, 1964, with the results of a study they had made in this area.