As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAINTENANCE FOUND THE FOUR FORWARD FLOOR EMERGENCY TRACK LIGHTS TO BE INOPERATIVE. THE POWER SUPPLY PROVIDING POWER TO THESE LIGHTS WAS BLOWING PICOFUSES FOR THAT SET OF LIGHTS. TROUBLESHOOTING INDENTIFIED A SHORT IN THE POWER WIRE BETWEEN THE POWER SUPPLY AND THE LIGHT SET. THE SHORTED WIRE WAS REPAIRED, RETURNING THE SYSTEM TO NORMAL OPERATION.