As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORY SMOKE MASTER WARNING DURING CRUISE. WARNING LASTED ONE MINUTE. F/A CONFRIMED AFT LAV AC RIGHT FIRE WARNING. NO SMOKE VISABLE AND NO SMOKE ODOR AFTER INSPECTING LAV. WARNING WENT AWAY ON ITS OWN. FOUND BOTH AFT LAV SMOKE DETECTORS FAILED, NOT TESTING. PULLED & RESET AFT LAV SMOKE DETECTORS CIRCUIT BREAKERS. ALL LAV SMOKE DETECTORS OPS TESTED GOOD IAW AMP 26-16-01. A/C OK FOR SERVICE.