As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - FLT 596 - AFTER TAKEOFF FROM BUR TO DFW, SMOKE REPORTED IN PASSENGER CABIN. EMERGENCY DECLARED AND AIRCRAFT LANDED LAX WITHOUT INCIDENT. REPLACED APU ENGINE OIL MAIN OIL DRAIN PLUG AND O-RINGS. PERFORMED AIR CONDITIONING PACK BURNOUT PER MM. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)