As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI- ON FLIGHT 2524 "SMOKE AFT LAVATORY" EICAS WARNING OCCURRED WITH SMOKE DETECTOR ALARM ACTIVATION IN LAVATORY. WARNING DISAPPEARED FOLLOWING PULLING CIRCUIT BREAKERS AS PER CHECKLIST. AIRCRAFT LANDED WITHOUT INCIDENT. REMOVED AND REPLACED NO.2 HOT AIR SHUTOFF VALVE. OPERATIONAL CHECKS GOOD.APU IS STILL ON MEL. AIRCRAFT RETURNED TO SERVICE.