What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW. ON CLIMB OUT GOT ECAM FUEL RIGHT WING TANK OVERFLOW. CREW COMPLIED WITH ECAM BUT CONTINUED VENTING. FOLLOW ECAM DOWN TO GRAVITY FEED. GOT ECAM AT FL 240 AND LEVELED AT FL 260 TO WORK ISSUE. THE AIRCRAFT LANDED SAFELY AT DFW WITHOUT FURTHER INCIDENT TAXIED TO THE GATE. MAINTENANCE REPLACED THE RIGHT HAND SURGE OVERFLOW SENSOR PER AMM 28-46-16. A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS ACCOMPLISHED.