As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OVERNIGHT MAINTENANCE, OPERATIONAL CHECK OF THE FLOOR TRACK EMERGENCY EXIT LIGHTS REVEALED THAT THE FIRST CLASS SECTION INCLUDING THE FLOOR LEVEL EXIT LIGHTS AT DOORS 1 LEFT AND 1 RIGHT WERE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK AND OPERATION RETURNED TO NORMAL.