As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 6102 - ABE -FLIGHT CREW REPORTED LAV SMOKE DET INOP / LAV SMOKE INDICATION ON EICAS COULD NOT BE CANCELLED. PLACED IN MEL. IAD MX CLEANED SMOKE DETECTOR SCREEN AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.