As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROLL CONTROL RESTRICTED IN FLIGHT IN BOTH AUTOPILOT AND MANUAL. THE FLIGHT CREW PERFORMED ROLL CONTROL RESTRICTION COM PROCEDURE. DESCENDED TO WARMER TEMPERATURES AND PROBLEM CLEARED. FLIGHT LANDED AT DESTINATION WITHOUT INCIDENT. MAINTENANCE REPLACED THE LEFT SLANT PANEL DRAIN VALVE AND INSPECTED AILERON CABLES. OPERATIONAL CHECK NORMAL.