As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REAR BEARING LEAKS AT THE SCAVENGE LINE BOSS. REPLACED BRONZE CRUSH SEAL TWICE WITH NO SUCCESS. IT WAS FOUND THE REAR BEARING HAD A SMALL NICK WHICH PREVENTED THE CRUSH SEAL FROM SEATING PROPERLY. SUSPECT SOMEONE NICKED THE REAR BEARING WHILE CLEANING COKE FROM MODULE 4. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.