As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE TOILET MESSAGE SHORTLY AFTER TAKEOFF STAYED ON ABOUT 3 MINUTES THEN WENT OUT. FLIGHT ATTENDANT NOTICED NOTHING UNUSUAL. WE DEICED AND DID NOTICE A STRONG ODOR OF THE FLUID. FOUND SPEED TAPE FOR WINTER OPS FELL OFF LAV VENT RE-COMPLIED WITH PA21-009 FOR REINSTALLING SPEED TAPE OVER LAV FLOOR VENT OK FOR SVC NO SMOKE OR SMOKE TOILET MESSAGE NOTED.