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“On April 30, 2014, an FAA air traffic system that processes flight plan information experienced problems while processing a flight plan filed for a USAF U-2 aircraft that operates at very high altitudes under visual flight rules,” a statement released Tuesday says. “The computer system interpreted the flight as a more typical low altitude operation, and began processing it for a route below 10,000 feet. The extensive number of routings that would have been required to de-conflict the aircraft with lower-altitude flights used a large amount of available memory and interrupted the computer's other flight-processing functions.”

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