What was found
DURING THE CLIMB, THE PILOT REPORTED NR 1 ENGINE OIL LEVEL & LOW PRESSURE INDICATIONS. RETURNED, AND AFTER A SAFE LANDING, PILOT REPORTED A NR 1 ENGINE EXCEEDANCE EICAS INDICATION AFTER LANDING. FOUND AN OIL LEAK FROM THE NR 1 ENGINE FWD SUMP BEING THE CAUSE OF THE FAILURE IAW AMM 71-71-02-200-801-A. LT ENGINE WAS REPLACED & PERFORMED ALL REQUIRED OPERATION TEST IAW AMM 71-00-00-001-710-801-B 500 WITH NO LEAKS OR FAULTS. THE ACFT WAS RETURNED TO SERVICE.