As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 3 ENGINE OIL PRESSURE LIGHT CAME ON WITH OIL PRESSURE TEMPERATURE NORMAL. ABNORMAL CHECKLIST PERFORMED, LIGHT STILL STAYED ON. DURING APPROACH INTO EWR, LIGHT WENT OFF. CLEANED OIL FILTER AND REMOVED AND REPLACED DIFFERENTIAL OIL PRESSURE SWITCH. RAN ENGINE SYSTEM. GROUND OPERATIONAL CHECKS NORMAL PER MAINTENANCE MANUAL. TOTAL CYCLES 13,001.