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 LAVATORY COMES ON INTERMITTENTLY.. NO ONE IN ANY LAVATORY AND NO SMOKE IN ANY LAVATORY. WENT AWAY FOR A MINUTE AND BACK ON AND WENT AWAY AGAIN. TWO TIMES. MAINTENANCE ACCOMPLISHED A BITE CHECK AND FOUND LAVATORY D FAULT, CLEANED SMOKE DETECTOR FILTERS AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.