What was found
THE NR 2 ENGINE EXPERIENCED COMPRESSOR STALL ACCOMPANIED BY HIGH EGT JUST AFTER TAKEOFF FROM LAS. THE AIRCRAFT WAS RETURNED TO LAS WHERE IT LANDED WITHOUT INCIDENT. THE NR 2 ENGINE WILL BE REMOVED AND REPLACED. THE HIGH PRESSURE COMPRESSOR DAMAGE REPORTED DURING THE BORESCOPE IN LAS WAS CONFIRMED ON MODULE STRIP. A 90 DEGREE ARC OF STAGE 2 ROTOR PATH LINING HAD EVACUATED AND MOST PROBABLY CAUSED THE DAMAGE FROM STAGE 2 DOWNSTREAM. THIS CONDITION CAUSED A REDUCTION IN COMPRESSOR EFFICIENCY THAT RESULTED IN A SIGNIFICANT REDUCTION IN SURGE MARGIN THUS INCREASING THE POTENTIAL EXPOSURE TO A SURGE CONDITION.