As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 6050, AVP TO LGA - ON SHORT FINAL, THE FLIGHT CREW RECEIVED A LAV SMOKE INDICATION ON EICAS. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THE FAULT AND FOUND THAT THE MESSAGE WAS PRESENT ONLY WHEN OPERATING OFF OF THE NR 1 BLEED SYSTEM. THE AIRCRAFT WAS THEN FERRIED TO CMH WHERE THE ZERO CARBON SEAL WAS REPLACED AND THERE WERE NO FURTHER INDICATIONS.