As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OMA - THE CREW REPORTED A FUEL LEAK FROM THE LEFT WING DURING CLIMB. THE AIRCRAFT RETURNED TO OMA WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE FLAPPER CHECK VALVE AT RIB 19 ON THE LEFT WING, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.