As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL BEGAN LEAKING FROM THE LEFT WING AFTER TAKEOFF. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND 92,000 POUNDS OF FUEL IN LEFT WING TANK (WHICH WAS VERY CLOSE TO CAPACITY). IT IS SUSPECTED THAT THE FUEL EXPANDED WITH HEAT AND DRIPPED OUT OF THE VENT BOX. NO LEAKS WERE NOTED ON GROUND. AIRCRAFT RETURNED TO SERVICE.