As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATL - FLIGHT 3128 - THE CREW REPORTED AN ELECTRIC BURNING SMELL IN THE COCKPIT AND FORWARD CABIN DURING CRUISE, WITH A BLEED TWO OVERHEAT WARNING ON EICAS. THE AIRCRAFT LANDED AT ATL WITHOUT INCIDENT WHERE MAINTENANCE INSPECTED THE AIRCRAFT. REMOVED AND REPLACED THE FORWARD FAN AIR VALVE CONTROL THERMOSTAT, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.