As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4103, THE CREW REPORTED THAT DURING CLIMB AND DESCENT THERE WAS AN OILY ODOR IN THE COCKPIT. THE AIRCRAFT WAS REMOVED FROM SERVICE. COMPLIED WITH ETN EM-72-034 R4 AND DETERMINED OIL SMELL IN COCKPIT TO BE EMANATING FROM THE NR 1 ENGINE. DETERMINED THAT THE NR 0 CARBON SEAL WAS FAULTY AND THE CAUSE OF THE OILY ODOR. THE NR 0 CARBON SEAL WAS REMOVED AND REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.