As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3009 - EWR - FLIGHT CREW REPORTED BURNING SMELL AND SMOKE IN THE COCKPIT. EWR MX REMOVED AND REPLACED NR 2 RECIRCULATING FAN AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. NO SMOKE/ NO BURNING SMELL NOTED. ACFT WAS APPROVED TO RETURN TO SERVICE.