What was found
INCREASE AT FL 320, 3 HOURS INTO FLT CHECKED ECAM SUNOPTICS AND FOUND ALL 3 HYD PRESSURES LOW. BLUE = 1500, GRN = 1500, YELLOW =1600. PRESSURES - 100. DVERTED. ON LDG, PRESSURE BLUE & GRN = 2850, YELLOW 300 PSI. RESET SDAC & CYCLED-TROUBLESHOT PER ASM 29-32-00 DETERMINED 1WV FAULTING FOR PRESS IND FWC DID NOT FLAG ANY OTHER INDICATIONS. REMOVE AND REPLACED SDAC PER AMM 31-55-22 / 401 OPS CKS OK PER AMM 31-51-00 / 501. IPC 31-55-08-02, ITEM OIOC.