What was found
DURING ATTEMPTED TAKE OFF AS THRUST LEVERS WERE BEING ADVANCED TO T/O THRUST SETTINGS "L OIL FILTER CLOGGING" WARNING LIGHT ILLUMINATED. THRUST LEVERS WERE RETARDED TO IDLE POSITION AND ABOVE WARNING LIGHT EXTINGUISHED. ANOTHER T/O THRUST SETTING WAS ATTEMPTED WITH SAME "L OIL FILTER CLOGGING" WARNING LIGHT ILLUMINATED. ABORTED TAKE OFF WAS ACCOMPLISHED. A/C RETURNED TO GATE. MT FOUND LT ENGINE MAIN OIL FILTER CONTAMINATED. FILTER WAS R/R. PERFORMED LEAK CHECK AND ENGINE RUN UP. OPS CHECK NORMAL NO LEAKS NOTED. ITEM WAS PLACED ON DMI TO ACCOMPLISH REPETITIVE INSPECTION OF OIL FILTER IN 50 FH.