As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3703 DURING DESCENT THE FLIGHT ATTENDANT REPORTED A FIRE IN THE LAVATORY TRASH RECEPTACLE AND HAD TO USE THE FIRE EXTINGUISHER TO PUT OUT FIRE. THE CAPTAIN DECLARED AN EMERGENCY AND LANDED AT ATL WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE AFT FIRE EXTINGUISHER IAW CRJ MM 26-23-01. THE AIRCRAFT WAS RETURNED TO SERVICE.