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 MESSAGE LASTED 7 TO 10 SECONDS, FLIGHT ATTENDANT SAID AFT LEFT LAVATORY. MAINTENANCE ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK OF LAVATORY SMOKE DETECTION SYSTEM, ALL TESTS PASSED PER AMM 26-17-00-710.