As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, FUEL BEGAN VENTING OUT OF RIGHT WING VENT BOX. LEFT FUEL GAUGE SHOWED A 300 TO 400 LBS DECREASE, VENTING STOPPED AT 7800 LBS. FLIGHT CONTINUED TO DTW AND LANDED WITHOUT INCIDENT. SUSPECTED THAT THE CLIMB VENT WAS STUCK OPEN. MAINTENANCE PERFORMED BACKFLUSH PER MM 28-10-5/301. NO LEAKS WERE NOTED.