As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: SMOKE DETECTOR AURAL AND VISUAL ALERT IN FORWARD LAVATORY (SMOKE UNCONFIRMED). LAVATORY WAS OCCUPIED. ACCOMPLISHED LAVATORY SMOKE DETECTOR SELF TEST FOR FIRST CLASS LAVATORY SMOKE DETECTOR PER AMM 26-14-00. CHECKS OK. CABIN CLEANER CONFIRMED CIGARETTE ASHES EVIDENT IN FIRST CLASS LAVATORY. OK FOR SERVICE.