As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2817 WAS DELAYED DUE TO THE CREW REPORTIA BURNING SMELL IN THE COCKPIT AND CABIN WITH THE PACKS RUNNING. MAINTENANCE INSPECTED THE AIRCRAFT, OPERATIONALLY TESTED THE PACKS WITH NO DEFECTS NOTED, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.