What was found
MSP - FLT 0080 - EN ROUTE DFW/MSP, THE NR 2 ENGINE HAD HIGH N2 VIBRATIONS, PERFORMED ICE SHEDDING PROCEDURES AND NR 2 ENGINE FLAMED OUT. DESCENDED FROM 35,000 FEET TO 24,000 FEET AND ACCOMPLISHED SUCCESSFUL WINDMILL START, NR 2 ENGINE STILL HAD N2 VIBRATIONS. KEPT NR 2 ENGINE AT 50 PERCENT THROTTLE, LANDED MSP WITHOUT INCIDENT. NO OTHER ABNORMAL INDICATIONS OCCURRED. REPLACED NR 2 ENGINE IAW 72-00-00-5 AND 71-00-00-4, RUN-UP OK. SHOP FINDINGS: ONE EACH HPC STAGE 1 BLADE FAILED AT MID-SPAN DUE TO POSSIBLE IMPACT DAMAGE AT LEADING EDGE RESULTING IN EXTENSIVE SECONDARY DAMAGE DOWNSTREAM IN HPC. ENGINE PROCESSED THROUGH SHOP AND RETURNED TO SERVICE. (X)