What was found
NR 1 ENGINE FAILED IN FLIGHT 85% N1, 60% N2, 600 DEG EGT, FF 4600, ROLL BACK - NO RESPONSE, NO RESTART. DURING TROUBLESHOOTING, FOUND FUEL PRESSURIZING AND DRAIN VALVE HOUSING CRACKED. REMOVED AND REPLACED P AND D VALVE IAW AMM 73-11-03, OPS AND LEAK CHECK OK - NO DEFECTS NOTED. ACCOMPLISHED FOCUS POWER PLANT EXTERNAL INSPECTION PARTS 1 TO 8 IAW SAI MAINTENANCE JOB CARD RNR 4771005R2, NO DEFECTS NOTED. ACCOMPLISHED BORESCOPE INSPECTION OF THE HPC, HPT AND LPT, NO DEFECTS NOTED. ACCOMPLISHED DETAILED INSPECTION OF THE MASTER CHIP DETECTOR IAW CARD 79-006-01-01, NO DEFECTS NOTED. COMPLIED WITH MPA IAW SAI, RNR 4771002R3, NO DEFECTS NOTED.