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 ALARM ACTIVATED AT L2 LAVATORY AND FLIGHT ATTENDANT CREW REST AREA, NO SIGN OF SMOKE OR FUMES. MAINTENANCE ACCOMPLISHED OPERATIONS CHECK OF LAVATORY L2 AND CREW REST SMOKE DETECTORS PER AMM 26-13-00B AND PERFORMED SATISFACTORY OPERATIONAL CHECK.