As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONT - FLIGHT 2359 JUST BEFORE STARTING DESCENT FROM 23,000 FT NOTICED SMOKE IN COCKPIT AND CABIN. DIVERTED TO ONT. DURING DESCENT AROUND 14,000 FT, HEARD AN UNEXPLAINED BANG WITH VERY SLIGHT YAW, NO CAUTION OR WARNING LIGHTS ILLUMINATED. MAINTENANCE REPLACED THE NR 2 ENGINE.