As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE AN ABRUPT MOMENTARY UNCOMMANDED AILERON ROLL IN CRUISE FLIGHT. FLIGHT CONTROL AILERON SERVO FAULT ILLUMINATED ON ECAM. AMBER B SYS FAULT INDICATED ON E & W DISPLAY. LT OTBD B AILERON CONTROL SERVO, FIN 33CE3 IAW AMM 27-14-51-000-001A. SYS OPS CHECKED SATISFACTORY.