As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEAVY OIL ODOR THRU ENVIROMENTAL SYS AFTER ADDING THRUST DURING DESCENTS AND CLIMB. FOUND OIL TO BE LEAKING FROM NR 1 ENGINE CARBON SEAL. REMOVED AND REPLACED THE CARBON SEAL IAW MM 72-25-25. OPS CHECKED GOOD. PERFORMED ETN ETN-EM-72-034. NO DETECTABLE ODOR AT THIS TIME. AIRCRAFT RETURNED TO SERVICE.