As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCI - FLT 564 - DURING DESCENT, SPEED BRAKE DEPLOYMENT CAUSED AIRCRAFT TO ROLL TO THE LEFT DURING INITIAL DEPLOYMENT ONLY AT HIGHER SPEEDS. OK BELOW 250 KTS. ADJUSTED ALL FLIGHT SPOILERS PER MM 27-61-51 AND 27-61-0. PERFORMED EVALUATION FLIGHT. CREW REPORTED SPEED BRAKE CHECKED NORMAL AT 300, 280, 250 AND 220 KNOTS. NO ROLL CONDITION NOTED. (M)