As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED SMOKE IN THE CABIN & COCKPIT DURING FLIGHT. DEACTIVATED THE AFFECTED ENGINE BLEED AIR WHICH STOPPED THE SMOKE. MX FOUND THAT THE ACM WAS OVERLUBRICATED DURING SCHEDULED SERVICING. MX DRAINED THE EXCESS OIL. NO FURTHER RECURRENCES WERE NOTED.