As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2337 - GSP - FLIGHT CREW REPORTED LAV SMOKE INDICATION ON EICAS. EWR MX REMOVED AND REPLACED SMOKE DET SENSOR AND REMOVED REPLACED SMOKE DETECTOR TEST PANEL IN GALLEY AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE. (SMOKE DETECTOR SENSOR REPORTED ON SDR C2XA11RI002, SMOKE DETECTOR PANEL REPORTED ON C2XA11RI003).