As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT, SMOKE IN CABIN ACTIVATED FORWARD LAVATORY SMOKE ALARM. FLIGHT CREW DECLARED RED EMERGENCY AND LANDED AT DESTINATION WITHOUT INCIDENT. MAINTENANCE REPLACED THE LEFT AIR CYCLE MACHINE AND THE LEFT AND RIGHT COALESCER BAG FILTERS. OPERATIONAL CHECK OK.