There were two crashes involving airplanes and trucks at O'Hare in the last two days. Two people were hurt in the most recent collision.
Around 11 p.m. Sunday, a fuel truck smashed into a Go Jet Airlines flight.
An airline spokesperson said GoJet Flight 3693, operating as United Express, was standing still just before takeoff when a fuel truck crashed into the plane's wing.
Chicago police said the truck driver was taken to Presence Resurrection Medical Center in good condition. A flight attendant was "slightly hurt" and also taken to Resurrection, police said.
The flight was headed to Omaha, Nebraska. There were 65 passengers and 4 crew members on board. No one on the plane was injured.
National Transportation Safety Board investigators are looking into what caused the crash.
On Saturday, a plane that had just landed from Canada slammed into an airport truck. No one was hurt in that collision.