As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS LAV SMOKE WARNING CAME ON FOR 2 SECONDS TEN SECONDS LATER. INDICATION ON F/A PANEL WAS THAT IT WAS THE FWD LAV. F/A STATED THERE WAS NO SIGN OR SMELL OF SMOKE. MAINTENANCE ACCOMPLISHED TEST ON LAV SMOKE SYS OPS CHECKS GOOD IAW AMM 26-17-00.