As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE ALARM IN GALLEY GOING OFF DURING DESCENT AROUND 12,000 FA CHECKED IT OUT AND THERE WAS NO SMOKE /FIRE HORN AND LIGHT WAS GOING OFF DURING FLIGHT AND ONLY LIGHT WAS GOING ON ONCE WE PARKED AT THE GATE-C/A-PERFORMED LAVATORY SMOKE DETECTOR SYSTEM TEST IAW EMB-145 AMM 26-14-00 OPS CHECK GOOD