As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE TO SEA ON FLIGHT 2478 (FAT-SEA), OVER SMF, RECEIVED A FLT CONTROL AILERON MALFUNCTION MESSAGE. FLIGHT DIVERTED TO SMF AND ACCOMPLISHED A UNEVENTFUL LANDING. MTX IN SMF PERFORMED A DETAILED INSPECTION OF THE AILERON CONTROL SYSTEM AND A RIGGING CHECK OF THE SYSTEM WITH NO DEFECTS NOTED. REPLACED THE AILERON SERVO MOUNT/CLUTCH. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.