As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SWF - FLT 4133 - CREW REPORTED SEVERAL EMERGENCY LIGHTS IN THE AFT CABIN TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE BATTEYR IN THE NR 4 POWER SUPPLY UNIT IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WS RETURNED TO SERVICE. (M)