What was found
NR 1 ENGINE FAILURE AT ROTATION. ACFT SHUTTERED. NO FIRE INDICATION TOWER ADVISED FIREBALL ON LT SIDE OF ACFT. AUS R IN WORK. AUS R PERFORMED VISUAL INSP OF INLET AND EXHAUST AREA(S). NO APPARENT DAMAGE NOTED IN INLET. METAL PARTICLES FOUND IN EXHAUST PIPE. OPENED FAN AND REVERSER COWLS TO INSPECT FOR OBVIOUS DAMAGE OR BLOWN DUCTS, NONE NOTED. FOUND AGENT 1 LO LIGHT ILLUMINATED IN COCKPIT AND NR 1 FIRE BOTTLE TO BE DISCHARGED. NO FUEL WAS DUMPED BY CREW DURING AIR TURNBACK, 49K STILL ON-BOARD AT BLOCK-IN. MC1 R DUE TO METAL IN THE TAIL PIPE. R & R NR 1 ENGINE IAW WORKCARDS 71T0201-1, WC 71T0101-1, WC 71T0701-1. PERFORMED ENGINE RUNS & LEAK CHECKS PER JRH CHAPTER 5 AND 7. AIRCRAFT OK FOR SERVICE.