As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A MAINTENANCE VISIT, THE EMERGENCY FLOOR PROXIMITY LIGHTS AT ZONE B ON THE RIGHT WERE FOUND TO BE INOPERATIVE. MAINTENANCE FOUND THE POWER SUPPLY TO BE DEFECTIVE AND REPLACED IT. SYSTEM OPERATION WAS NORMAL AFTER THE POWER SUPPLY WAS REPLACED.