Skywest CRJ2 at Chicago on Oct 20th 2014, control problems

A Skywest Canadair CRJ-200 on behalf of United, registration N926SW performing flight OO-5290/UA-5290 from Asheville,NC to Chicago O'Hare,IL (USA) with 44 passengers and 3 crew, was on approach to Chicago O'Hare Airport west of the aerodrome when the crew declared emergency reporting they had kind of lost their flight controls, were able to perform only left hand turns and had difficulty maintaining altitude. Chicago TRACON and all approach controllers stopped all descents towards Chicago at their present altitudes providing a minimum separation of 2000 feet to the CRJ-200 at about 2000 feet MSL, the CRJ-200 performed a left hand turn towards Chicago Dupage Airport where the aircraft landed safely at high speed (230 knots over ground) on runway 20L still in contact with Chicago TRACON, Dupage emergency services inquiring with tower about the status of the aircraft were told, tower was still not talking to the emergency aircraft after the aircraft had landed. A short time later the crew switched to tower frequency and advised again they had kind of lost their flight controls and performed a flaps up landing, emergency services reported there were no signs of fire, smoke, heat or any leaks. After the brakes had cooled down a bit the aircraft taxied to the apron, where the passengers disembarked.

The passengers were bussed to O'Hare Airport.

The airline confirmed a mechanical problem.