What was found
FUEL L TK 1 AND 2 LO PRCAME ON IN FLIGHTALSO FWS SDAC 2 FAULT SDAC2 REPORTED MULTIPLE ERRONEOUS FAULTS IN CONCURRENCE WITH THE ACFT EXPERIENCING AN AC1 BUS FAULT ( REFERENCE LOGPAGE 4493538). PERFORMED GROUND SCAN OF CFDS WITH NO FAULTS FOUND. REPLACED SDAC1 & SDAC2 PER AMM 31-55-34-400-001-A AS PRECAUTIONARY UNDER THE DIRECTION OF TOMC. BOTH SDAC1 & SDAC2 TEST NORMAL WITH NO FAULTS FOUND. / PARTS USED: 31-3150-9-0006,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1729415 SN OFF 0341 TT # 1769298 SN OFF 0343 UNIT, SYSTEM DA OFF 31-3150-9-0006 0341 ON 31-3150-9-0006 0264 UNIT, SYSTEM DA OFF 31-3150-9-0006 0343 ON 31-3150-9-0006 6107