As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. LAVATORY SMOKE DETECTOR WENT OFF IN AFT LEFT LAVATORY. NO INDICATION OF SMOKE COCKPIT OVERHEAD AND 6-PACK ALSO ILLUMINATED. PERFORMED OPERATIONAL CHECK OF LAVATORY SMOKE DETECTION PER AMM 26-14-00. NO DEFECTED NOTED.