What was found
AILERONS REQUIRED UNUSUAL FORCE TO TURN PAST CENTER. CONTROLS LOCK IN PLACE UNLESS UNUSUAL FORCE IS APPLIED. DECLARED EMERGENCY, DIVERTED, AND LANDED WITHOUT INCIDENT. R & R THE LT RIB 52 IAW SRM 51-41-01. INSTALLED REINFORCEMENT DOUBLE ON FWD SIDE IAW SB170-0066, REV 02. REPAIR IS NON FCS.