As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AIR PACK 2 OVERHEAT FAULT MESSAGE OCCURED DURING APPROACH, FLIGHT ATTENDANT REPORTED A BURNT PLASTIC SMELL. FLIGHT CREW TURNED OFF THE #2 PACK AND THE ODOR WENT AWAY. MAINTENANCE REPLACED THE RIGHT HAND AIR CONDITIONING SYSTEM CONTROLLER 57HH AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO FAULTS OR ODORS NOTED.