As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISC - MAINTENANCE FOUND DURING PS/1 CHECK THAT AFT EMERGENCY EXIT SIGN AT ROW 12A INOP. AIRCRAFT REMOVED FROM SERVICE. MAINTENANCE REPLACED THE EMERGENCY EXIT SIGN AND OPERATIONALLY CHECKED GOOD IAW EMBRAER AMM 33-50-13. AIRCRAFT WAS RETURNED TO SERVICE.