What was found
FLIGHT 9807, THE CREW REPORTED AN OILY SMELL THAT CONTINUED THROUGH FLIGHT. THE ODOR WAS WORSE IN CLIMB AND DESCENT, ALSO NOTICED AN INTERMITTENT BURNING SMELL AS WELL. OXYGEN MASKS WERE USED DUE TO STRONG ODORS IN THE DESCENT. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. ON INVESTIGATING OIL SMELL IN COCKPIT DISCOVERED NR 2 ENGINE CARBON SEAL SEEPING. REMOVED AND REPLACED THE NR 2 ENGINE CARBON SEAL IAW MM 72-25-25. THE AIRCRAFT WAS RETURNED TO SERVICE.