As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL PRESSURE ANNUNCIATOR ILLUMINATED, GAUGE INDICATED OIL PRESSURE WAS LOW. PILOT ELECTED TO SHUTDOWN ENGINE. INVESTIGATION REVEALED CORROSION INTERNALLY IN THE REAR RGB CASE HAD CREATED AN OIL LEAK RESULTING IN EXCESSIVE OIL LOSS FOR THE ENGINE.