Northwest Orient Airlines Flight 705 was a scheduled passenger flight operated on February 12, 1963 by a Boeing 720 aircraft that took off from Miami International Airport, flew into a severe thunderstorm, and crashed into the Everglades. Investigators believed that the pilot responded by applying full nose down elevator and full nose down stabilizer trim to prevent further airspeed loss. The flight departed Miami International Airport into areas of anticipated turbulence associated with thunderstorm activity. Northwest Airlines Flight 705 was a regularly scheduled passenger flight from Miami to Portland, Oregon, with intermediate stops at Chicago, Illinois and Spokane and Seattle, Washington. Northwest Flight 705 was a scheduled flight from Miami, FL (MIA) to Portland, OR (PDX) with intermediate stops at Chicago, IL (ORD), Spokane, WA (GEG) and Seattle, WA (SEA). During the planned maneuvering, approximately 13 minutes after takeoff, and while climbing through 17500 feet, the flight encountered a strong updraft, resulting in a high nose up pitch attitude and vertical speed of approximately 9000 feet per minute, and an associated decrease in airspeed from 270 knots to 215 knots. Lost in the accident were 35 passengers and 8 crew members, who are remembered this day by the loved ones they left behind and the people who care for Everglades National Park. These actions proved effective in substantially reducing the occurrence of this type of pitch upset events. On the flight deck that day was Captain Roy Almquist and First Officer Robert Feller. These pitch upset events were collectively referred to as "Jet Upsets." Date: February 12, 1963. It plowed into a remote area of the Everglades 42 miles southwest of Miami International Airport.
A Northwest Airlines Boeing 720, designated flight 705, was scheduled to depart at 1:30pm bound for Portland, Oregon. The investigation of Northwest Flight 705, and associated similar pitch upset incidents, led to changes in operating procedures and design requirements for jet transports, as well as improved forecasting and dissemination of hazardous weather information to Air Traffic Control and Flight Crews. The departure strategy required maneuvering away from the identified thunderstorms immediately after takeoff, in order to climb above the thunderstorms and subsequently fly over them.
The flight departed Miami International Airport into areas of anticipated turbulence associated with thunderstorm activity. This terminology was used because the phenomena appeared to be unique to the new generation of swept wing jet transports which began to enter service a few years earlier. Northwest Airlines Flight 705 was a regularly scheduled passenger flight from Miami to Portland, Oregon, with intermediate stops at Chicago, Illinois and Spokane and Seattle, Washington. Air France It was a nasty afternoon in Miami the day of February 12, 1963. Northwest Airlines Flight 705 From Wikipedia, the free encyclopedia N723US, the sister ship of the aircraft involved in the accident, photographed at Detroit Metropolitan Wayne County Airport in July 1962. JSTOR (August 2012) (Learn how and when to remove this template message) Northwest Airlines Flight 705 N723US, the sister ship of the aircraft involved in the accident, photographed at Detroit Metropolitan Wayne County Airport in July 1962. Fifteen minutes after takeoff, Flight 705 broke apart in flight. Northwest Orient Airlines Flight 705 was a scheduled passenger flight operated on February 12, 1963 by a Boeing 720 aircraft which broke up in midair and crashed into The Everglades shortly after take-off from Miami International Airport in a severe thunderstorm. HOMESTEAD, Florida - Everglades National Park commemorates the loss of 43 people who perished 50 years ago today when Flight 703 broke apart mid-air due to severe weather and crashed in a remote area of Everglades National Park. Following these control inputs, the airplane entered a steep dive, and accelerated to beyond 470 knots. In spite of recovery attempts by the pilot, the airplane was not able to be recovered from the dive, and broke up in flight below 10,000 feet.The Civil Aeronautics Board determined that the probable cause of the accident was the unfavorable interaction of severe turbulence and large longitudinal control displacements resulting in a longitudinal upset from which a successful recovery was not made.As the investigation of Northwest Flight 705 proceeded, other jet transports became involved in similar upsets. The plane was destined to Portland, Oregon, via Chicago, Spokane… Northwest Orient Airlines Flight 705 was a scheduled passenger flight operated on February 12, 1963 by a Theresa Heil Trebon, of Sedro-Woolley, Washington, who lost her father in the accident (
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