As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 2201 - THE CREW REPORTED DURING CLIMB AND DESCENT THERE WAS A OIL ODOR IN THE COCKPIT AND CABIN. MAINTENANCE REPLACED THE NR 1 ENGINE. OPERATIONAL CHECKS WERE GOOD. SUPPLEMENT THE NR 4 CARBON SEAL WAS FOUND TO BE THE CAUSE OF OIL ODOR.