As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH FAS SMELLED A BURNING PLASTIC SMELL IN THE CABIN. NO SMOKE NOTED. THE ODOR STARTED TO DISSIPATE ON THEIR RTF, THE CREW THOUGHT THAT MIGHT BE RELATED TO THE REC FAN BEING TURNED OFF. THE SMELL CAME FROM THE CABIN AND LASTED LESS THAN 15 MINUTES. NO MEDICAL ATTENTION WAS REQUIRED. / C/W FIM FOR SMOKE IN THE CABIN IAW CRJ900 FIM 21-22-00-810-806-A01. NO SMELL AND DEFECTS NOTED.