As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING TASK CARD # 78273000, (FAULT CODE) 73-21281 - EEC CHANNEL IS NOT ENERGIZED WITH THE ALTERNATOR VOLTAGE. - SHORT TIME - FL 0, 1, AND 10 ONLY. GROUNDED - YES. PERFORMED TEST 13 ENGINE RUN EEC BITE CHECK REF B737-900 AMM 71-00-00-700-808-F00 ON # 1 ENG, NO FAULTS FOUND DURING CURRENT FAULTS OR FAULT HISTORY. NO FAULTS UNDER LEG 0 PER B737-900 FIM 73-27 TASK 805.