What was found
AFTER DEPARTURE NR 1 ENGINE BYPASS INDICATOR ILLUMINATED. PERFORMED COM 2-72-19 PROCEDURE. RETURNED TO DFW CHANGED NR 1 ENG MAIN OIL FILTER REF MM 79-15-00. RAN ENG, INSPECTED FILTER, NO PARTICAL FOUND REF MM 71-00-00. INSPECTED NO DEBRIS NOTED REF P&W MM 72-00, SUBSEQUENT NR 1 ENGINE CHANGE.