As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 6349, CVG TO LIT. DURING INITIAL CLIMB THE FLIGHT CREW RECEIVED A PTRIM MAIN INOP MESSAGE ON EICAS. THE CREW PERFORMED THE APROPRIATE QRH CHECKLIST ITEMS AND THE ACFT LANDED WITHOUT INCIDENT BACK AT CVG. MAINTENANCE TROUBLESHOT THE FAULT TO THE HORIZONTAL STAB CONTROL UNIT AND REPLACED IT. THE TRIM SYSTEM OPS CHECKED GOOD AND THE ACFT WAS RETURNED TO SERVICE. (S)