As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2284 - LAVATORY SMOKE DETECTOR WENT OFF 6 TIMES. MAINTENANCE REMOVED DUST FROM THE SMOKE DETECTOR WITH A LIGHT BLAST OF NITROGEN. PERFORMED OPERATIONAL TEST WITH NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.