As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX INFLT T31/05AUG. CREW REPORTED SMOKE FILLING CABIN. DROPPED OXYGEN MASKS. RETURNED TO LAX AND LANDED WITHOUT INCIDENT. DEPLOYED 6 SLIDES FOR EMERGENCY EVACUATION. FOUND EVIDENCE OF OIL ON NR 1 ENGINE INTERMEDIATE PRESSURE BLADES STAGE 5 AND 6 AND HIGH PRESSURE BLADE STAGE 1. ALSO FOUND OIL LEAKING ON COMPRESSOR CASE AT 6 OCLOCK POSITION. REPLACED NR 1 ENGINE ON 07AUG AT LAX. SYSTEM GROUND CHECKED NORMAL OPS. (CLOSED)