As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAINTENANCE REPORTED THE EMERGENCY LIGHTS AT AFT SERVICE DOOR OVERHEAD, AFT CENTER AISLE OVERHEAD AND LEFT-HAND AFT ENTRY DOOR EXTERIOR, WERE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK ON AFT LEFT-HAND POWER SUPPLY. OPERATIONAL CHECK OF EMERGENCY LIGHTS GOOD.