As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2030, DURING TAXI THE CREW REPORTED THAT THE NUMBER ONE PACK OVERHEATED WITH A BURNING ODOR IN THE COCKPIT. THE AIRCRAFT RETURNED TO THE GATE WHERE MAINTENANCE INSPECTED THE AIRCRAFT AND PLACED THE NR 1 PACK ON MEL, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.