As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE LEFT FUEL QUANTITY DROPPED 300 POUNDS AFTER TAKEOFF AND THAT MOISTURE WAS STREAMING OFF OF THE LEFT WING. MAINTENANCE REMOVED AND REPLACED THE LEFT WING FUEL VENT VALVE IAW WITH THE AMM PROCEDURES. OPS CHECKED GOOD.