Clever conditions were accused of getting a plane to slip off a track at the Hare International Airport shortly after landing late on Saturday morning.
Due to the weather conditions, United Airlines aircraft 656 rolled from Phoenix to Chicago out of concrete surface, according to airline spokeswoman Natalie Noonan.
No one was injured, but firefighters helped 129 passengers out of the plane after it went into a grassland, said Chicago Fire Dept. Chief Curtis Hudson.
It happened during the planned landing of the flight.
A shuttle bus took customers to the terminal, Noonan said.
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