What was found
REGISTRATION NUMBER - B18703NR 2 ENGINE, NR 2 VIB IND 4.1 UNITS, ENGINE LOST POWER. IAW SOP SHUTDOWN ENGINE AND ENGINE EXPERIENCED 3 HOURS WINDMILL. BORESCOPE INSP FOUND NR 2 ENGINE ALL HPC 3RD STAGE BLADES DAMAGED SERIOUSLY. REPLACED NR 2 ENGINE AND RUN UP TEST NML. INITIAL INVESTIGATION: HPC BORESCOPE INSPECTION FOUND, STG 1 BLADE: 2 EA BALDES TIP CURL, STG 2 BLADE: SOME BLADES NICKS ON L/E. STG 3 THRU STG 5 BLADE: ALL BLADES FOUND SERIOUS DAMAGED (TEAR, LIBERATION, SEPARATION) ON AIRFOIL. NR 2 ENGINE WAS REMOVED AND REPLACED, ENGINE RUN UP NORMAL.