As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE TROUBLESHOOTING ESS TRANSFORMER RECTIFIER, NR 1 TRANSFORMER RECTIFIER SHOWED LOW AMPS ON ELECTRIC PAGE. REPLACED NR 1 TRANSFORMER RECTIFIER PER MM. ENCOUNTERED ESS TRANSFORMER RECTIFIER FAULT AFTER EMERGENCY GENERATION CHECK. REPLACED ESS TRANSFORMER RECTIFIER UNIT AND TRANSFORMER RECTIFIER CONTACTOR 3 PER MM, CHECKED OKAY.