As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LIFTOFF LAV SMOKE ON EICAS. SMOKE CONFIRMED BY FLIGHT ATTENDANT DECLARED EMERGENCY AND RETURNED FOR LANDING. FOLLOWED AOM PROCEDURES LANDED BELOW MAX LANDING WEIGHT. REMOVED AND REPLACED ENG 1 IAW W.C. 71-000-00. AIRCRAFT RETURNED TO SERVICE.