As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNCOMMANDED ROLL TO THE LEFT ON DESCENT DURING SPEEDBRAKE USAGE AT 4500 FEET WITH AUTOPILOT ON. PERFORMED VISUAL INSPECTION OF FLIGHT CONTROLS, ALL NORMAL. PERFORMED BITE OF AFS/LAND, CHECK NORMAL. NO FAULTS FOUND ON POST-FLIGHT REPORT OR LST LEG REPORT.