As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2121, ON TAKEOFF THE CREW REPORTED A FUEL ODOR THAT GOES AWAY WHEN SWITCHING FROM APU BLEED TO ENGINE BLEED. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE OPERATIONALLY CHECKED THE BLEED SYSTEM WITH NO DEFECTS NOTED AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.