As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS, HEAVY SMOKE IN COCKPIT AND CABIN. TURNED RIGHT PACK OFF AND THEN LEFT PACK, NO HELP. CREW TURNED OFF SOME ELECTRICAL FUNCTIONS AND SMOKE WAS SOMEWHAT BETTER ON APPROACH. SOURCE OF SMOKE MAYBE OIL OR ELECTRICAL. OIL WAS FOUND IN THE LEFT PACK SYSTEM. THE COALESCER BAG WAS REPLACED AND A PACK BURNOUT WAS ACCOMPLISHED.