As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMER LT BATT FAULT EICAS MESSAGE. MAINTENANCE REMOVED AND REPLACED THE NR 2 ELPU. WHILE TESTING THE SYSTEM, FOUND MED LIGHT AND SIGN NOT ILLUMINATING. MAINTENANCE REMOVED AND REPLACED THE NR 1 ELPU AND MED EXIT SIGN LIGHT. ALL OPS CHECKS GOOD.