As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO ATL DUE TO UNCOMMANDED FUEL VENTING FROM LEFT WING TIP IN FLIGHT. FUEL VENTING STOPPED ONLY AFTER CENTER TANK WENT DRY. MAINTENANCE FOUND FUEL LINE AFT OF RIGHT AFT FUEL BOOST PUMP FITTING DISCONNECTED. RE-INSTALLED LINE AND SECURED FITTING. ALL TRANSFER CHECKS COMPLETED WITH NO LEAKS DISCOVERED. ALL CDCCLS COMPLIED WITH AND THE AIRCRAFT HAS RETURNED TO SERVICE.