As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4153 DURING CRUISE THE CREW REPORTED SMOKE IN CABIN AROUND ROW 9 COMING FROM THE FLOOR AND IN THE COCKPIT. AN EMERGENCY WAS DECLARED AND THE CAPTAIN ELECTED TO DIVERT TO MDT. THE AIRCRAFT SAFELY LANDED AT DESTINATION. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE AIR CYCLE MACHINE IAW EMB AMM 21-51-03. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.