As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO ANC DUE TO VERY STIFF CONTROL YOKE MOVEMENT TO THE LEFT, OK UNTIL ABOUT 20 DEGREES PAST CENTER, ALSO SEEMS NORMAL ON GROUND, AIRSPEED OR CONFIGURATION DID NOT SEEM TO EFFECT IT. CLEANED AND LUBED L&R AILERON TERMINAL QUADRANTS, CHECKED RIG OF AILERON SPRING TABS-CHECKED GOOD. OPS CK OK ON GROUND.