Investigators say a medical helicopter might have had both engines fail just before it crashed along a major highway on Chicago's south side earlier this month.
The three crew members on board were injured in the July 7 crash, as the helicopter landed upright along Interstate 57 near its junction with I-94.
The National Transportation Safety Board's preliminary report says the helicopter took off from Hobart, Indiana, and was about 5 miles from Advocate Christ Medical Center in Oak Lawn when the pilot tried to turn for the Gary, Indiana, airport and soon declared "mayday."
The Chicago Tribune reports that a flight nurse was seriously hurt, while the pilot and paramedic suffered minor injuries. The patient wasn't hurt in the crash but was taken to a hospital in critical condition.
