As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4551 THE CREW REPORTED HEAVY OIL SMELL THROUGH ENVIRONMENTAL SYSTEM AT TAKEOFF POWER SETTINGS AND AFTER ADDING POWER AFTER PROLONGED IDLE DESCENTS. THE AIRCRAFT WAS REMOVED FROM SERVICE. ACCOMPLISHED ETN EM-72-034 R4. NOTED DEFECTS ON ETN. THE AIRCRAFT WAS RETURNED TO SERVICE.