As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2816, THE CREW REPORTED FUEL LEAKING FROM THE LEFT WING ON TAKEOFF. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE AFFECTED FLAPPER VALVE, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.