What was found
FLT 489, BOS-LGB, AIR RETURN TO BOS, ENG NR1 STALL ON DEPARTURE AT APPROX 100FT ALT. WITH THRUST REDUCTION ECAM INDICATION WENT AWAY AND CONTINUED TO CLIMB TO FL230. PERFORMED QRH 6-26 ITEMS AND STALL OCCURRED AGAIN. WITH NUMBER 1 THRUST LEVER TO IDLE WENT AWAY. ON RETURN TO BOS INDICATIONS NORMAL UNTIL 10 MILES OUT. ECAM INDICATED 1 STALL AND REMAINED. COMPLETED ECAM ACTIONS AND SHUT DOWN NR1 ENG. LANDED SAFELY AND RETURNED TO GATE. ACCOMPLISHED LPC/HPC BOROSCOPE. DAMAGE TO STG 3 HPC, BEYOND LIMITS. REMOVED AND INSTALLED NR1 ENG PER WORK ORDER 24077. (S)