Date: February 12, 1963
Time: 13:48
Location: Near Miami, Florida
Operator: Northwest Orient Airlines
Flight #: 705
Route: Miami - Chicago
AC Type: Boeing B-720-051B
Registration: N724US
cn / ln: 18354/224
Aboard: 43   (passengers:35  crew:8)
Fatalities: 43   (passengers:35  crew:8)
Ground: 0
Summary: The aircraft crashed 37 miles west-southwest of Miami after penetrating a thunderstorm and encountering severe turbulence. The aircraft initially entered an area of updrafts followed by downdrafts which put the aircraft into a high speed dive. While trying to pull out of the dive, the aircraft broke apart from excessive g forces. The crew is believed to have concentrated on maintaining a given airspeed in an extreme turbulence condition instead of flying attitude. In doing so, excessive stress was applied to the wings which separated from the fuselage. The weather was considerably worse than forecast.

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