As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2170, THE CREW REPORTED THAT THE COCKPIT HAD A TOXIC ODOR. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE FLIGHT GUIDANCE CONTROLLER TO BE BURNT. MAINTENANCE REMOVED AND REPLACED THE FLIGHT GUIDANCE CONTROLLER, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.