What was found
WHILE PERFORMING T/C 78273000,FOUND ENGINE #1 FAULT CODE SHORT TIME 75-30451 "THE VBV POSITION SIGNALS DISAGREE ". DEFERRED PER T/C 75273000. GROUNDED - YES. PERFORMED B737-900 FIM 75-32 TASK 803. THERE IS A SINGLE CHANNEL FAULT 75-10451 LEG 2 AND 10 AND SINGLE CHANNEL FAULT 75-20451 ON LEG 10. PERFORMED EEC TEST FIM 73-00 TASK 801 WITH NO EEC FAULTS FOUND AND ACTUATORS TEST PER B737-900 AMM 71-00-00 NO FAULTS FOUND. PER FIM 75-32 TASK 803 IF THERE IS A SINGLE CHANNEL FAULT REPLACE EEC. REMOVED #1 ENGINE EEC PER AMM 73-21-60-000-801-F00. INSTALLED EEC PER AMM 73-21-60-400-801-F00. ACCOMPLISHED SOFTWARE LOAD PER AMM 73-21-60-470-801-F00 ACCOMPLISHED FADEC SYSTEM TEST PER AMM 73-21-00-700-802-F00 ALL TESTS PASSED.