What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PHX DURE TO THE FLIGHT CREW REPORTING THAT AFTER TAKEOFF, AND APPROXIMATELY 1 MINUTE AFTER THRUST REDUCTION TO CLIMB POWER, LOUD BANG WAS HEARD AND ENGINE 2 STALL APPEARED ON ECAM. SIMILAR LOUD BANG NOISE WAS HEARD AFTER LANDING WHILE SELECTING REVERSE THRUST. THE AIRCRAFT LANDED SAFELY AT PHX WHERE IT TAXIED TO THE GATE UNDER ITS OWN POWER. MAINTENANCE REPLACED THE #2 ENGINE AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER TASK CARD 26L40071004.