As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND ENG NR 1 SHORT TIME FAULT 73-11281 EEC CHANNEL IS NOT ENERGIZED WITH THE ALTERNATOR VOLTAGE. GROUNDED-YES. REMOVED & REPLACED NR 1 ENGINE EEC, REF B737-900 AMM 73-21-60. ALL INSTALLATION TEST PASSED. REPAIR CONFIRMATION TEST PASSED, REF B737-900 FIM 73-21 TASK 807.