As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT DURING FLIGHT THE LEFT WING FUEL CAP WAS VENTING FUEL. THE FLIGHT CREW ELECTED TO DIVERT FLIGHT AND RETURN BACK TO THE AIRPORT FOR MAINTENANCE CONSIDERATIONS. THE LANDING WAS UNEVENTFUL. THE MAINTENANCE TEAM DETERMINED THE FUEL CAP SEAL WAS WORN. THE FUEL CAP WAS REMOVED AND REPLACED WITH A NEW CAP. OPS CHECKS GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.