As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LSE - FLT 4186 - DURING CABIN CHECK, CREW REPORTED THE MID CABIN FLOOR PROXIMITY EMERGENCY LIGHTS WERE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE NR 3 POWER SUPPLY UNIT IAW EMB MM. OPERATIONAL CHECK WAS SATISFACTORY AND AIRCRAFT WAS RETURNED TO SERVICE. (M)