As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, CREW WAS INFORMED OF SMOKE IN CABIN. CHECK LIST FOLLOWED & UNSCHEDULED LANDING PERFORMED WITHOUT INCIDENT. ON DESCENT & APPROACH SMOKE SUBSIDED. MX EVALUATION FOUND ENG OIL CONTAMINATION IN BLEED AIR SYS & IDENTIFIED COMING FROM LT ENG LP BLEED, POSSIBLY NR 2 CARBON SEAL. LT ENG REMOVED FOR FURTHER INVESTIGATION OF EXACT SOURCE.