What was found
JFK - DURING CLIMB NR 2 ENGINE, S/N 4619, EXPERIENCED A POWER SURGE. ENGINE PARAMETERS REMAINED WITHIN LIMITS. FOUND 9TH STAGE COMPRESSOR BLADE DAMAGE. REPLACED ENGINE AND THEN ENGINE OPERATION CHECKED NORMAL. INVESTIGATION REVEALED THE HIGH PRESSURE COMPRESSOR HAD SEVERE RUB OF THE INNER AIRSEALS AND TO THE OUTER RUBSTRIPS AND BLADE TIPS. THE HIGH PRESSURE COMPRESSOR MODULE WAS REPLACED AND ENGINE S/N 4619 WAS RETURNED TO SERVICE. (M)