As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN-FLIGHT, OIL PUMP CASE SEAL FAILURE. SILK THREAD DISPLACED FROM PARTING FLANGE. INSPECTIONS REVEALED WARP AT PARTING FLANGE. SILICONE USED BY OVERHAUL FACILITY TO SEAL FLANGE. THIS SHOP SUGGESTS FOLLOWING TCM DIRECTIVES FOR SEALER IN THIS AREA. SILICON SHOULD 'NOT' BE USED.