As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 1454 - IAH - ON CLIMB-OUT FUEL VENTING OVERBOARD OUT LEFT WING. AIRCRAFT RETURNED TO IAH. FOUND THAT CLIMB VENT VALVE NEEDED TO BE REPLACED. REMOVED AND REPLACED VENT VALVE P/N 770400. FILLED RT WING TO 9300 LBS AND OPS CHECK GOOD. (W)