As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4468, THE CREW REPORTED AN OIL SMELL IN THE COCKPIT MOST OF THE FLIGHT. THE FLIGHT ATTENDANT DID NOT NOTICE ANY SMELLS IN THE CABIN. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED LEFT ENGINE NR 1 IAW 71-000-00. OPERATIONAL CHECK GOOD.