What was found
PRIOR TO TOP OF DESENT, RECEIVED LVL 1 "FIRE DET 1 FAIL",SHORTLY THEREAFTER, RECEIVED LVL 3 "ENG 1 FIRE". INTERMITTENTLY SHUTDOWN ENGINE IAW QRH LANDED VHHH 25R. *DISCHARGED BOTH FIRE BOTTLES* INTERROGATED CFDS FDCU-1 CURRENT FAULTS SHOWN "LOOP B FAULT" AND "LOOP A FAULT". "FIRE DET 1 FAIL" ALERT ON ENG PAGE AND "FIRE DET 1 FAIL" ON STATUS PAGE. PERFORMED ENGINE POST - WINDMILLING INSPECTION PER AMM 72-00-05-06-1 AND ENGINE WITH COWLING CLOSED/OPEN INSPECTION PER AMM 72-00-01-6-1,ALL BLEED PRESSURE DUCTS CHECKED NORMAL, CLOSED NR 1 ENGINE COWLING PER AMM 71-10-00-2, NR 1 ENGINE RAN PER JRH, ALL PARAMETERS READ NORMAL, ACFT OK FOR SERVICE.