As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3031 THE CREW REPORTED SMOKE SMELL ON APPROACH TO CLEVELAND. MAINTENANCE INSPECTED AND FOUND THE NR 1 ENGINE TO BE LEAKING OIL INTERNALLY. THE NR 1 ENGINE WAS REPLACED AND OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.