As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN-FLIGHT OIL PRESSURE FLUCTUATED UP TO 8 BARS, PILOT LANDED AND MAINT CALLED, PERFORMED OIL FLOW CHECK. RESULT, 18 CC. REMOVED ENG AND DISASSEMBLED, FOUND REAR BEARING OIL DELIVERY PORT IN BEARING CAGE COMPLETELY BLOCKED BY COKING. SUBMITTER RECOMMENDS ENLARGMENT OF JETS TO REAR BEARING.