As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3956 -ATB- RETURNED TO ATL DUE TO SUSPECTED FUEL LEAK. CORRECTIVE ACTION: MTC INSPECTED AND FOUND NO EVIDENCE OF FUEL LEAK. FOUND CROSSFEED VALVE ACTUATOR DEGRADED CAUSING IMBALANCE. REPLACED CROSSFEED VALVE AND ACTUATOR. OPS CHECK OK.