Northwest Orient Airlines Flight 706 was a

Lockheed L-188 Electra The Lockheed L-188 Electra is an American turboprop airliner built by Lockheed. First flown in 1957, it was the first large turboprop airliner built in the United States. Initial sales were good, but after two fatal crashes that led to expensiv ...

aircraft,

registration Register or registration may refer to: Arts entertainment, and media Music * Register (music), the relative "height" or range of a note, melody, part, instrument, etc. * ''Register'', a 2017 album by Travis Miller * Registration (organ), th ...

which crashed on take-off from

Chicago (''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name ...

's O'Hare International Airport September 17, 1961. All 37 on board were killed in the accident. Flight 706 began its day in

Milwaukee, Wisconsin Milwaukee ( ), officially the City of Milwaukee, is both the most populous and most densely populated city in the U.S. state of Wisconsin and the county seat of Milwaukee County, Wisconsin, Milwaukee County. With a population of 577,222 at th ...

, and was scheduled to stop at Chicago before travelling to Tampa,

Fort Lauderdale A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere'' ...

, and

Miami, Florida Miami ( ), officially the City of Miami, known as "the 305", "The Magic City", and "Gateway to the Americas", is a East Coast of the United States, coastal metropolis and the County seat, county seat of Miami-Dade County, Florida, Miami-Dade C ...

. It arrived at Chicago in the early morning and left soon afterwards, being cleared for takeoff at 8:55 AM. Takeoff was normal until the aircraft reached the altitude of 100 feet above ground level, when witnesses noticed a slight change in the sound of the Electra's engines. The aircraft began a gentle bank to the right as the starboard wing began to drop. The bank angle increased to 35°; at that point the tower controllers picked up a garbled broadcast believed to be from the pilots. The aircraft climbed to approximately 300 feet but continued to bank, eventually reaching a bank angle of over 50°. At that point, the starboard wing nicked a series of high-tension power lines running along the south boundary of the airport; shortly after that, the aircraft struck an embankment and cartwheeled onto its nose. The forward fuselage broke off, the plane pancaked and skidded, then launched into the air and slammed nose-first into the ground, falling over on its back and exploding into a ball of flame. The accident took less than two minutes from the beginning of takeoff until the final crash. Investigators with the

Civil Aeronautics Board The Civil Aeronautics Board (CAB) was an agency of the federal government of the United States, formed in 1938 and abolished in 1985, that regulated aviation services including scheduled passenger airline serviceStringer, David H."Non-Skeds: T ...

determined that the cable physically connecting the first officer's control wheel to the aileron boost unit had disconnected. This had caused the ailerons to put the aircraft in a starboard-wing-down attitude, and had prevented the pilots from being able to correct the bank. The cables attaching the pilots' control wheels to the aileron boost unit had been removed two months before the accident during routine maintenance; a safety cable that held part of the assembly together had not been replaced when the cables were hooked back up. The contact slowly separated, until it completely failed during the takeoff sequence.

References

External links

Aircraft Accident Report on Flight 706
* *''Air Disaster, Vol. 4: The Propeller Era'', by

Macarthur Job Macarthur Job (10 April 1926 in Taree, New South Wales – 6 August 2014 in Melbourne) was an Australian aviation writer and air safety consultant. He published nine books on aviation safety. He was formerly a Flying Doctor pilot, and held ...

, Aerospace Publications Pty. Ltd. (Australia), 2001 *''The Crash of Flight 706: The Impact and Breakup Sequence ...'', by Craig Hagstrom, 201

{{DEFAULTSORT:Northwest Orient Airlines Flight 0706 Airliner accidents and incidents in Illinois Aviation accidents and incidents in the United States in 1961 1961 in Illinois Airliner accidents and incidents caused by maintenance errors Northwest Orient Airlines flight 706 crash History of Chicago 706 O'Hare International Airport September 1961 events in the United States Accidents and incidents involving the Lockheed L-188 Electra

See also

References

External links