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  • BOEING SAFETY

  • Boeing B767 Loss of Control due to Unreliable Airspeed

  • On 19 June 2009 a Boeing 767-300 on a scheduled passenger flight from Chicago O�Hare (USA) to Warsaw (Poland) was in the cruise at FL330 in night IMC when one of the air speed indicators suddenly displayed a false high reading, which triggered an over speed warning,and one of the altimeters recorded a simultaneous sudden increase. The flight crew response was based on the presumption that the speed increase was real and thrust was reduced and the aircraft put into a climb. A stall warning followed and descent was then made to a level 5000ft below the previous cruise level followed by a diversion to Toronto (Canada). There were no injuries to the 216 occupants and the aircraft was undamaged.
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