As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON T/O CLIMB OUT ACFT HAD AN UNCOMMANDED ROLL. TRIM SWITCH UNRESPONSIVE, PERFORMED UNCOMMANDED ROLL CHECKLIST, NO OTHER ACTION TAKEN. MX FOUND THAT THE AILERON TRIM POTENTIOMETER WAS SHORTED. REPLACED POTENTIOMETER. OPS CHECK SATISFACTORY.