As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 320 AND 3100 LBS IN RIGHT TANK AND 0 LBS IN CENTER WING TANK O FULL, RT EICAS MESSAGE APPEARED RIGHT WING WAS VENTING FUEL MOVED CENTER WING X-FER SWITCH TO OFF ABOUT 30-40 SECONDS LATER EICAS MESSAGE DISAPPEARED AND FUEL STOPPED VENTING. REMOVED AND REPLACED RT O/B TRANSFER FLOAT VALVE IAW 750 MM 28-20-06. LEAK CHECKED PANELS WITH FUEL CAPACITY AT MAXIMUM FOR 40 MINUTES. NO LEAKS NOTED.