As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3789 THE CREW REPORTED THAT THE NUMBER 4 AFT EMERGENCY LIGHT WAS INOPERABLE. AIRCRAFT REMOVED FROM SERVICE. REPLACED THE NUMBER 4 AFT EMERGENCY LIGHT CHARGER AND BATTERY IAW EMB AMM 33-50-04. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.