As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2985 - EWR - CREW REPORTED LAV SMOKE AND SMOKE IN THE CABIN DURING TAKEOFF. CREW PERFORMED AIR RETURN AND LANDED AIRCRAFT UNEVENTFULLY. EWR MX REMOVED AND REPLACED NR 2 ACM IAW EMB 145 AMM 21-51-03 AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.