What was found
AFTER THE NR 1 ENGINE STARTED, AND WITH BOTH ENGINES RUNNING, RECEIVED AN ECAM CAUTION FOR THE CENTER TANK FEED TRANSFR AT TWO DIFFERENT TIMES. PERFORMED AN ECAM ACTION TO SHUT DOWN CENTER TANK FUEL PUMPS AND SWITCH TO MANUAL FEED. TROUBLESHOT IAW TSM 28-21-00-720-001-A. REMOVED AND REPLACED THE CENTER TANK PUMPS, NR 1 AND 2 CONTROL RELAYS 51QA AND 52QA IAW ESPM 20-46-00. ACCOMPLISHED SATISFACTORY OPS TEST IAW AMM 28-21-00-710-007-A, AND FUNCTIONAL TESTED IAW AMM 28-21-00-720-001-A. AIRCRAFT WAS GROUNDED.