As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4176 CREW REPORTED RECEIVING A LAV SMOKE INDICATION ON CLIMB ON EICAS FOLLOWED BY FA REPORT OF SMOKE IN CABIN. CREW RETURNED FOR AND LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. C/A DETERMINED OIL/SMOKE SMELL TO BE COMING FROM NR 2 ENGINE. R&R NR 2 ENGINE IAW AE MTC 71-000-00. OPS CHECKS AND LEAK CK GOOD. NO DEFECTS FOUND AT THIS TIME. ACFT RETURNED TO SERVICE.