As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTIONS IT WAS DISCOVERED THAT THE FRONT FAIRING EMERGENCY LIGHT AND AISLE EMERGENCY LIGHT WERE INOPERATIVE. TROUBLESHOOTING FOUND THAT NR 1 EMERGENCY BATTERY WAS NOT WORKING. THE BATTERY WAS REPLACED AND ALL CHECKS WERE OK.