As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECIRC FAN FAULT STATUS MESSAGE FOLLOWED BY BURNING RUBBER SMELL. TROUBLE SHOT RECIRC FAN FAULT STATUS MESSAGE "RECIRC FAN 2, FAILED WIRING/LOW FAN SPEED" IAW CRJ 900 FIM 21-22-10-810-802-A02. REMOVED AND REPLACED RT RECIRC FAN IAW CRJ 900 AMM 21-22-10-000/400-801-A01. OPS CHECK GOOD.