What was found
ACFT RETURNED OF FLIGHT DUE TO DURING CLIMB, EICAS MESSAGE AND LIGHT TURNED ON OF ENG OIL FILTER L WAS SHOWN. THE FLIGHT CREW PERFORMED THE QRH ENG OIL FILTER L, R PROCEDURE, CONFIRMING THE FAILURE. MX PERSONNEL REPLACED THE LT OIL DIFFERENTIAL PRESSURE SENSOR AND OIL FILTER IAW MM 79-21-12 AND MM 79-21-07, ALL CORRECT. AN OVERWEIGHT INSP WAS PERFORMED IAW MM 05-51-35-210-801 PHASE I-A, NO DAMAGES WERE FOUND.