As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR FLT 2994 - THE CREW REPORTED A LAV SMOKE EICAS MESSAGE DURING CLIMB. LIGHT SMOKE IN THE CABIN AND COCKPIT WAS REPORTED. THE AIRCRAFT RETURNED AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 1 ENGINE AND OPERATIONAL CHECKS WERE GOOD.