What was found
UPON TAXI OUT WITH ABOUT 30% N1, ENGINE #1 OIL FILTER BYPASS LIGHT ILLUMINATED. GROUNDED - YES. PERFORMED B737-800 FIM 79-05 TASK 817. NO FAULT CODE SHOWING. NO DEBRIS ON THE MCD. FILTER BYPASS STATUS INDICATEDS "NO". NO LEAKS ON THE MCD. REF FIM 79-05 TASK 817. EEC BITE, NO FAULTS, NO CLOG. REPLACED J7 HARNESS, ALL OPS NML. EEC BITE TEST PASS, ACTUATORS TEST PASS, RAN BOTH ENGINES WITH NO DISCREPANCIES NOTED. ALL SYS OPS NML. REF B737-800 AMM 73-21-06, 71-00-00, 73-21-00, FIM 79-05 TASK 817. ETOPS GROUND VERIFICATION SATISFACTORY.