Northwest Orient Airlines Flight 706
Northwest Orient Airlines Flight 706 was a Lockheed L-188 Electra aircraft, registration which crashed on take-off from Chicago'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, and was scheduled to stop at Chicago before travelling to Tampa, Fort Lauderdale, and Miami, Florida. 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 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.
Q852646
Lockheed L-188 Electra
MISC
Q107211021
registration
UNK
Q1297
Chicago
LOC
Q213717
O'Hare International Airport
LOC
Q37836
Milwaukee, Wisconsin
LOC
Q49255
Tampa
LOC
Q165972
Fort Lauderdale
LOC
Q8652
Miami, Florida
LOC
Q5089489
starboard
Concept
Q17675706
Civil Aeronautics Board
ORG
Q509379
aileron
Concept
Q1043452
routine maintenance
Concept
Q7060146
Northwest Orient Airlines Flight 706
MISC
1961-09-17T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
September 17, 1961
DATE
-188^^http://www.w3.org/2001/XMLSchema#decimal
-188
NUMBER
+37^^http://www.w3.org/2001/XMLSchema#decimal
37
NUMBER
+8^^http://www.w3.org/2001/XMLSchema#decimal
8
NUMBER
+55^^http://www.w3.org/2001/XMLSchema#decimal
55
NUMBER
+35^^http://www.w3.org/2001/XMLSchema#decimal
35
NUMBER
+50^^http://www.w3.org/2001/XMLSchema#decimal
50
NUMBER
point in time
number of deaths
located in the administrative territorial entity