As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, FLT 390, WITH AUTOPILOT ON, EXPERIENCED SUDDEN FIVE DEGREE ROLL OR DIP TO LT WITH IMMEDIATE RECOVERY. AT SAME TIME FLIGHT CONTROL AILERON SERVO FAULT ECAM APPEARED ON FLIGHT CONTROL PAGE LT AILERON "B" HAS AMBER BOX DISPLAYED. ECAM & QRH COMPLIED WITH IAW TSM 27-10-00-810-804-A. FOUND LT OTBD AILERON SERVO LEAKING FLUID. R & R SERVO IAW MM 27-14-51. OPS AND LEAK CHECKED OK.