What was found
NR 1 ENGINE FAILED IN FLIGHT. N1 (O%), N2 (15%), N3 (0%), OIL PRESS (0%), WITH VIBRATION. EMERGENCY CHECK LIST CARRIED OUT. NO HYDRAULIC PRESSURE. CONTINUED TO MIAMI, LANDED WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED NR 1 ENGINE HIGH SPEED EXTERNAL GEARBOX MODULE ASSY IAW MM 72-00-06. RUN-UP, LEAK CHECK, ALL SYSTEMS CHECK NORMAL IAW 71-00-00 AND MFG RECOMMENDATIONS. AIRCRAFT RETURNED TO SERVICE.