What was found
CLIMBING THROUGH 35,000 FEET, EXPERIENCED AN INFLIGHT COMPRESSOR STALL EVENT, ECAM MESSAGE CAME ON AND NR 1 ENGINE. SUSTAINED 3 AUDIBLE COMPRESSOR STALLS IAW FLIGHT CREW. DESCENDED TO 33,000 FEET AND AIRCRAFT DIVERTED. REMAINDER OF FLIGHT ENGINE OPERATED NORMALLY. MAINTENANCE TROUBLESHOOTING IAW TSM 73-00-00-810-865. REPLACED THE LEFT ENGINE. AIRCRAFT WAS GROUNDED.