As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ON APPROACH, SMOKE LAVATORY SMOKE ANNUNCIATED FOR APPROXIMATELY 1 SECOND. CLEARED WITHOUT CREW ACTION. MAINTENANCE ACCOMPLISHED A SYSTEM REBOOT AND PERFORMED A SATISFACTORY TEST OF THE SMOKE DETECTION SYSTEM WITH NO FAULTS NOTED PER AMM 26-17-00.