What was found
ON TAKEOFF ROTATION, ENGINE NR 3 HAD 2 COMPRESSOR STALLS. N1 ROLLED BACK AND RECOVERED, EGT REACHED 950 DEGREES CELSIUS. ON CLIMB-OUT AND CRUISE ENGINE OPERATED NORMAL. PERFORMED TEST 72-00-00-206-050-020. STALL INSPECTION, FOUND HPC STAGE 6, THREE BLADES 50 PERCENT MISSING. REMOVED AND REPLACED ENGINE IAW A717101GT1. ENGINE RUN UP AND LEAK CHECK, OPS NORMAL IAW B150201FT1 TEST 6 VIBES 2.1 AT N1 109.9. (M)