As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MSP - FLIGHT 2470, THE CREW REPORTED WHITE CABIN SMOKE AT 2000FT. THE AIRCRAFT RETURNED TO MSP WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE RE-ATTACHED THE MUFFLER TO THE RT RECIRC FAN, OPERATIONALLY TESTED WITH NO DEFECTS AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.