As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE BEFORE TAKEOFF CHECKLIST ON THE FLIGHT CONTROL CHECK, THE AILERONS TOOK ABNORMALLY EXCESSIVE FORCE TO ACTIVATE THE SYSTEM ON BOTH CA & FO YOKE. PERFORMED TROUBLESHOOTING OF AILERONS. PERFORMED GVI OF ALL ACCESSIBLE PULLYS AND CABLES. MEASURED FORCE TO ACTIVATE AILERONS WITH FORCE (PUSH/PULL GAUGE). AILERONS OPERATE SMOOTHLY WITH NO BINDING OR EXCESSIVE FORCE APPLIED AND RETURN TO NETURAL.