What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT. ON TAKEOFF ENGINES STABILIZED AT 1.05. WHEN FLEX THRUST, WAS APPLIED NUMBER 1 ENGINE LAGGED AND AFTER A SECOND OR TWO IT CAME UP AND MATCHED NUMBER 2. AT APPROXIMATELY 800 FEET, BEFORE THRUST REDUCTION WE GOT THE ECAM ENGINE 1 SENSOR FAULT AND POSSIBLE ENGINE STALL. FLIGHT CREW ACCOMPLISHED ECAM PROCEDURES AND CLIMBED TO FL 260. FLIGHT CREW ACCOMPLISHED SUPPLEMENTAL PROCEDURES, CONTACTED MAINTENANCE AND THE DECISION WAS MADE TO RETURN TO CLT WHERE THE AIRCRAFT LANDED SAFELY. MAINTENANCE REPLACED LEFT HAND BLEED PRESSURE REGULATOR VALVE CONTROL THERMOSTAT SOLENOID 10HA1 (AALA202403262736) PER AMM 36-11-55 AND REPLACED THE LEFT ENGINE ELECTRONIC ENGINE CONTROL (EEC) PER TASK CARD 26L40073002. (AALA202403269219) A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.