As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FROM VTBU, A SLIGHT BURNING SMELL WAS DETECTED DURING CRUISE WHEN USING LEFT RECIRC FAN. FAN WAS TURNED OFF AND SMELL WENT AWAY. MAINTENANCE REMOVED AND REPLACED THE LT RECIRC FAN IAW ALL APPLICABLE MANUALS. THE AIRCRAFT WAS RETURNED TO SERVICE.