As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER 10 MINUTES OF RUNNING THE RT RECIRCULATION FAN , THE CREW SENSED AN ELECTRICAL/ OZONE SMELL. THE RT RECIRCULATION FAN WAS TURNED OFF, CIRCUIT BREAKER WAS PULLED AND SMELL WENT AWAY. MX REPLACED THE RT RECIRCULATION FAN. OPS CHECK GOOD IAW MM 21-21-1 AND 21-21-0. ACFT WAS RETURNED TO SERVICE.