As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM LAS TO JFK RECEIVED SMOKE DETECTOR CONTROL UNIT MESSAGE, DIVERTED TO PHX FOR REPAIR. MAINTENANCE TROUBLESHOT IAW TSM 26-17-00-810-803, REMOVED AND REPLACED LAVATORY A SMOKE DETECTOR (1WQ) IAW 26-17-15, OPERATIONAL CHECK WAS GOOD. VENDORS FUNCTIONAL TEST OF SMOKE DETECTOR S/N 2207 WAS NO FAULT FOUND, ALL FUNCTIONS TESTED WITHIN MANUFACTURERS SPECIFICATIONS. AS PRECAUTION THE UNIT CELL WAS CLEANED.