As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED MAINTENANCE THE NR 2 ENGINE WAS FOUND TO BE THE SOURCE OF SMOKE ACCUMULATING IN THE PASSENGER CABIN. MAINTENANCE REMOVED AND REPLACED THE ENGINE TO CORRECT THE DISCREPANCY. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. SDR CLOSED.