As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FROM KPHL, THE CREW DETECTED SMOKE FROM THE RECIRCULATION FAN AND NOISY. THE CREW TURNED OFF RECIRCULATION FAN SMOKE ODOR DISSIPATED. THE CREW LANDED IN KEWR WITHOUT FURTHER INCIDENT. MAINTENANCE IN KEWR REPLACED THE RECIRCULATION FAN. OPERATIONAL CHECK GOOD IAW MM 21-20-4. AIRCRAFT WAS RETURNED TO SERVICE.