As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED DUE TO NR 1 ENGINE OIL LEAK. NUMBER 5 BEARING CARBON SEAL HOUSING WAS FOUND TO BE OUT OF DIMENSION, DEFLECTED, AND SCORED. IT PERMITTED AN OIL PATH TO EXIST AT THE HOUSING/TURBINE EXHAUST CASE(TEC) ATTACHMENT FLANGE. ONCE PAST THE FLANGE OIL MADE ITS WAY INTO THE GASPATH. OIL DID NOT GET BY THE CARBON SEAL BECAUSE NO COKING/STREAKING WAS EVIDENT ON THE ID OF THE T6 INNER ROTATING AIRSEAL.