As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT EXPERIENCED AN UNCOMMANDED ROLL TO THE LEFT WHEN THE SLATS WERE EXTENDED FOR LANDING AT GRB. THE BLUE SLAT EXTEND DID NOT ILLUMINATE AND THE SLAT DISAGREEMENT ANNUNCIATOR DID LIGHT UP. CREW RECYCLED SLATS AND GOT THE SAME RESULTS. FLIGHT RETURNED TO MSP, FOLLOWED COM PROCEDURES FOR LANDING, AND ARRIVED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE LEFT SLAT T-DUCT DUE TO BINDING. AIRCRAFT RETURNED TO SERVICE.