As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE AFT LAV WARNING MESSAGE IN FLIGHT. (F/A REPORTED NO SMOKE, NO ONE IN THE LAV, WARNING MESSAGE LASTED LESS THAN 10 SECONDS). REMOVED AND REPLACED AFT SMOKE DEFECTOR IAW CRJ 550 AMM 26-16-01. OPS CHECKED GOOD , AT THIS TIME IAW CRJ 550 AMM 26-16-00.