As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4051 - CREW REPORTED THE LAVATORY SMOKE WARNING MESSAGE ON EICAS AND THEN WENT OUT. TAKEOFF WAS ABORTED AND EMERGENCY WAS DECLARED. ORD FIRE DEPARTMENT FOUND NO EVIDENCE OF ANY SMOKE OR ANYTHING BURNED. MAINTENANCE FOUND THE ZERO CARBON SEAL LEAKING IN THE NR 2 ENGINE. CARBON SEAL WAS REPLACED IAW RR MM. OPERATIONAL AND LEAK CHECKS WERE GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)