As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR FLIGHT NR 2879 THE CREW REPORTED A ROLL TRIM SWITCH STUCK IN FLIGHT. THE ACFT DIVERTED AND LANDED IN CLE. MX INSPECTED AND CLEANED AND LUBRICATED THE ROLL TRIM SWITCHES. OPS CHECKS WERE GOOD. A COMPANY ECTM WORKSHEET WAS ISSUED AND THE TRIM SWITCH WAS REPLACED. OPS CHECKS WERE GOOD.