What was found
AT BEGINNING OF DESCENT, BOTH FMGC FAILED, A/P, A/T, ND'S TRIPPED OFF. USED BACK-UP NAV CYCLED FMGC, MCDU, FCU CB'S AND RECOVERED TEMPORARILY. LT FMGC FAILED AGAIN 2-3 TIMES. RT FMGC SEEMED TO OPERATE NORMAL. ALL ADIRU'S REALIGNED AND FMGC NR 1 AND NR 2 RESET. AFS TEST OK, NO LAST LEG RECORD OF AFS, ADIRU OR CPC FAULTS. NO PAST HISTORY (30 DAYS), CPC 1 AND 2 BITE CHK OK. UNABLE TO FAULT NAV OR AFS SYSTEMS AT THIS TIME. CLEARED FOR FURTHER FLIGHT.