What was found
ON TAKEOFF FROM LGB EN ROUTE FOR PHX SHORTLY AFTER SETTING TAKEOFF POWER, THE ECAM INDICATED LT FUEL TANK NR 1 BOOST PUMP LOW PRESSURE, REJECTED TAKEOFF AND PUMP RETURNED TO NORMAL OPERATION. MAINTENANCE PLACED LT FUEL TANK PUMP ON MEL 28-21-01, CONDITION NR 3, " LT WING TANK PUMP INOPERATIVE". MAINTENANCE REPLACED THE LT FUEL TANK NR 1 PUMP IAW AMM 28-21-51-401, OPERATIONAL CHECK WAS GOOD.