What was found
JUST AFTER ROTATION FLIGHT ENCOUNTERED LOUD BANG AND VIBRATION FROM THE REAR OF AIRCRAFT. SHUT DOWN NR 3 ENGINE. DUMPED FUEL AND RETURNED TO MIA. *S/D* ENGINE DISASSEMBLY REVEALED FIVE SECOND STAGE NOZZLE GUIDE VANES BURNED THROUGH AND SUBSEQUENT DOWNSTREAM DAMAGE. THE FAILURE WAS CONTAINED. THE T2 NGV BURN THROUGH WAS CAUSED BY A LEAKING NR 8 FUEL NOZZLE WHICH WAS SEVERELY DETERIORATED. THE NOZZLE PASSED A SUBSEQUENT FLOW CHECK. THE NOZZLE IS UNDER INVESTIGATION TO DETERMINE THE ROOT CAUSE OF THE LEAK.