What was found
NR 2 ENGINE CONTROL LIGHT ILLUMINATED AFTER ENGINE START. ACFT GROUNDED. ENGINE CONTROL LIGHT OUT AFTER BLOCK IN. ACCOMPLISHED BITE IAW FIM 73-00, TASK 801- FOUND FAULT (3) CODES 73-21282, 73-10012, 73-10042 IN "RECENT FAULTS", FAULT HISTORY. AT THIS POINT ELECTRONIC ENGINE CONTROL BITE FAILED. UNABLE TO RETURN TO BITE- ELECTRONIC ENGINE CONTROL INOPERATIVE. GVI OF ELECTRONIC ENGINE CONTROL & HARNESS SHOWS NO FAULTS. REPLACED NR 2 ENGINE, ELECTRONIC ENGINE CONTROL UNIT, REF MM 73-21-60-000-801-F00; 73-21-60-400-801-F00. PERFORMED FADEC SYS TEST IAW MM 73-21-00-700-804-F00. ALL TESTS PASS. PERFORMED ENGINE RUN, OPS CHECK GOOD.