As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ENGINE WAS REMOVED FOR EXCESSIVE OIL LEAKAGE. DURING THE REPAIR INVESTIGATION THE PN JR27664, LPT SCAVENGE TUBE WAS FOUND COMPLETELY BLOCKED WITH CARBONIZED OIL, AND CAUSING EXCESSIVE OIL LEAKAGE FROM THE ENGINE. THE PN JR27664 TUBE, AS WELL AS PN JR29486, LPT PRESSURE TUBE, WERE REPLACED WITH OHC REPLACEMENTS.