As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE NR 3 OIL PRESSURE LIGHT FLICKERED CLIMBING THROUGH 8,000 ON T/O. ACCOMPLISHED ALT PROC AND DETERMINED AN IMPENDING OIL BYPASS. RETURNED TO DEN. WHEN THRUST RETARDED, OIL LIGHT WENT OUT. INSPECTED AND REPLACED OIL FILTER DUE TO CARBON, LIGHT FLICKERED AGAIN DURING GROUND RUN. REPLACED OIL PRESSURE SWITCH.