As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORT OF SMOKE IN CABIN AND COCKPIT ON FINAL DESCENT INTO DENVER. SMOKE WAS NOTICED COMING FROM NR 1 ENGINE. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE.PER T.C. 120-7100-00. SUBSEQUENT ENGINE RUNS SUCCESFUL. OPERATIONAL CHECKS GOOD. AIRCRAFT RELEASED FOR SERVICE