As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DECENT AFT LAV SMOKE MSG CAME ON. FOLLOWED QRH AND PULLED CB'S. MSG DID EXTINGUISH. FA'S STATED NO SMOKE APPEARED. INSPECTED AFT LAV AREA FOR SIGNS OF FIRE OR HEAT DAMAGE. NONE NOTED. COMPLETED OPERATIONAL CHECK OF AFT LAV FIRE DETECTOR. OPS CHECK GOOD IAW CRJ AMM 26-16-00 PGS 501-502. RESET NOTED CIRCUIT BREAKERS.