As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW CREW REPORTED LT PACK FAIL INDICATION FOLLOWED BY SMOKE ODOR IN CABIN. FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LT PACK RAM AIR INLET ACTUATOR. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.