What was found
AFTER STARTING TAXI THE FUEL RT WING TANK OVERFLOW MSG SHOWED ON ECAM. DUE THAT REASON THE ACFT RETURNED TO THE GATE FOR MX. THE ACFT WAS HELD ON GND & PERFORMED FAULT ANALYSIS AS FOLLOWS. IAW TSM 28-26-00-810-805-A, REPLACED THE RELAY 8QL IAW ESPM 20-53-11. IAW TSM 28-26-00-810-801-A REPLACED THE RELAYS 7QL, 10QL & 11QL IAW ESPM 20-46-50. IAW TSM 28-26-00-810-815-A, 28-26-00-810-806-A & 28-26-00-810-805-A REPLACED THE PUSH BUTTON SWITCHES 4QL, 5QL & 6QL IAW ESPM 20-45-11. IAW TSM 28-26-00-810-805-A REPLACED THE ACTUATOR VLV 12QL IAW AMM 28-26-51 PB40 & OBTAINED NORMAL RESULTS ON THE OPERATIONAL TEST. AFTER THOSE MX ACTIONS THE ACFT WAS RETURNED TO SERVICE.