As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 3 ENGINE OIL STRAINER CLOG CAME ON AFTER TAKEOFF LIGHT-SHUT DOWN ENGINE. IAW FLIGHT MANUAL PROCEDURES, RETURNED TO DEPARTURE STATION. REMOVED AND REPLACED NR 3 OIL STRAINER PRESSURE SWITCH. PERFORMED ENGINE RUN UP PRESSURE AND TEMPERATURE NORMAL SYSTEM OPS/LEAK CHECK, GOOD. FILTER INSPECTION CLEAN, NO DEFECTS. C/A: REPLACED OIL PRESSURE SWITCH AND FILTER.