As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, TOWER INFORMED CREW OF FLUID VENTING FROM LEFT WING, APPROX 5 FT FROM WINGTIP. AIRCRAFT RETURNED TO PHX AND MADE AN UNEVENTFUL LANDING. PERFORMED INSPECTION OF WING AND FUEL DUMP SYSTEM PER BOEING M/M WITH NO DEFECTS NOTED.