What was found
747F B18708 A/C GTB DUE TO HEAVY SNOW AT LUX. ENG-2 SURGED AND FLAMEOUT DURING T/O ROLL (GROUND SPEED<45 KNOTS), GTB AGAIN. GROUND INSP FOUND METAL DEBRIS IN ENG-2 TAIL PIPE. BORESCOPE ALL 4 ENGINES, FOUND ENG-3 4 EA HPC 1ST STAGE BLADES L/E AND T/E TIP MATERIAL MISSING WHICH ARE OUT OF LIMIT. NR 1 AND NR 4 ENGINE BSI RESULTS WERE NORMAL. NR 2 AND NR 3 ENGINES WERE REPLACED BY AOG TEAM. ENGINE RUN UP AND TEST FLIGHT NORMAL.