As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT THROUGH 14000 @ 320 K SPEED BRAKES EXTENDED AUTOPILOT ENGAGED AIRCRAFT MADE AN UNCOMMANDED ROLL TO THE RIGHT. AUTOPILOT WAS DISENGAGED. AIRCRAFT HANDLED NORMAL AT THAT TIME. SPEED BRAKES APPEARED TO EXTEND SYMMETRICALLY AND RETRACTED EVENTUALLY. AUTO PILOT RE0~-ENGAGED AND NO FURTHER ISSUES.