As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE, PAX AND CREW SMELLED SMOKE IN THE BACK OF THE ACFT. AN EMERGENCY WAS DECLARED AND ACFT WAS DIVERTED AND LANDED UNEVENTFULLY. IT WAS DETERMINED THAT 1 OF THE 2 AIR CYCLE MACHINES HAD FAILED CAUSING THE HAZY SMOKE. THE AIR CYCLE MACHINE WAS MEL'D AND THE ACFT WAS FERRIED FOR REPAIR. THE FAILED ACM WAS REPLACED AND OPS CHECKED GOOD. THE ACFT WAS RETURNED TO SERVICE.