As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - CREW REPORTED LEFT PACK OVERHEAT INDICATION DURING CLIMBOUT WITH STRONG BURNING SMELL IN COCKPIT AND CABIN. EMERGENCY DECLARED FLIGHT RETURNED LAX LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND ZONE 1 CONTROLLER FAULTING RAM AIR ACTUATOR. REPLACED LEFT RAM AIR ACTUATOR. SYSTEM GROUND CHECK NORMAL OPERATION.