What was found
AIRCRAFT WAS GROUNDED: ON CLIMBOUT, PASSING 12,500, RECEIVED A FUEL RIGHT WING TANK OVERFLOW ECAM. TURNED OFF CENTER TANK RIGHT TRANSFER PER ECAM AND WAITED 5-7 MINUTES, BUT ECAM STAYED ON, SO COMPLIED WITH REST OF ECAM PROCEDURE, RIGHT TANK STAYED AMBER FOR ENTIRE FLIGHT BUT OCCASIONALLY FLASHED GREEN. MAINTENANCE REPLACED THE RIGHT WING OVERFLOW SENSOR 28QJ2 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.