What was found
ON TAKEOFF AT SEA EN ROUTE FOR PHX AFTER APPLYING TAKEOFF THRUST FLIGHT CREW HEARD A LOUD BANG ON LT SIDE OF AIRCRAFT FOLLOWED BY A BURNING ODOR, REJECTED TAKEOFF AT 20 KTS, ANOTHER AIRCRAFT REPORTED SEEING FIRE COMING OUT OF THE NR 1 ENGINE, FIRE FIGHTERS RESPONDED AND FOUND NO EVIDENCE OF FIRE. MAINTENANCE INSPECTED THE NR 1 ENGINE AND FOUND METAL IN THE TAILPIPE, ENGINE WILL BE REPLACED. MX R & R NR 1 ENGINE IAW T/C R5M71302, ENGINE RUN OPERATIONAL CHECK WAS GOOD. TEAR DOWN REPORTS CONFIRMS REASON FOR REMOVAL. MTU ATTRIBUTES THE COMPRESSOR STALL TO A STAGE 4 BLADE TEARING OFF.