As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, FLT CREW REPORTED VERY STIFF AILERONS, ALMOST UNABLE TO TURN A/C. A/C WOULD NOT TURN ON A/P BOTH THE LEFT AND RIGHT A/P WOULD DISCONNECT IF ENGAGED AND A TURN INPUT MADE, CENTER A/P NOT USED. FLT CREW DECLARED AN EMERGENCY AND A/C LANDED WITHOUT INCIDENT IN VIE. FURTHER T/S REVEALED LEFT A/P FCC FAILED. CONFIRMED AILERONS OK AND NOT BINDING. REPLACED FCC.