As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT FROM CVG TO ALB APPLIED RUDDER TRIM TO THE LEFT, TRIM CONTINUED TO RUN AND HAD TO BE STOPPED. RE-CENTERED TRIM, NO FURTHER INCIDENCE. A/C RETURNED TO CVG LANDED SAFELY. FOUND RUDDER TRIM KNOB DRAGGING ON FACE PLATE AND WOULD NOT SPRING BACK. REPLACED AILERON/RUDDER TRIM CONTROL PANEL.