As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 2214 - EWR - CREW REPORTED GATE RETURN FOR A SECOND TIME DUE TO LAV SMOKE FALSE ALARM. FIRST TIME SYSTEM WAS RESET. EWR MX REMOVED AND REPLACED LAV SMOKE DETECTOR IAW EMB 135 AMM 26-14-01. MX PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.