As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 3561, THE CREW REPORTED SMOKE IN THE COCKPIT AFTER TAKEOFF. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE RAM AIR DOORS TO BE IN THE OPEN POSITION. MAINTENANCE CLOSED THE RAM AIR DOORS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.