As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED SMOKE IN CABIN AFTER TAKEOFF FROM IAH. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. TROUBLESHOOTING BY MAINTENANCE FOUND THAT THE FIRST CLASS GALLEY NR 1 OVEN WAS ON AND THE EXHAUST FAN WAS NOT OPERATING. THE OVEN AND CONTROLLER WERE REMOVED AND REPLACED. BOTH PACK COALESCER BAGS WERE REPLACED. THE ENGINES WERE OPERATED AT TAKEOFF POWER AND A HEAT CYCLE WAS RUN WITH NO DEFECTS NOTED.