What was found
ON LANDING RECEIVED "SINGLE FMC OPERATION" SCRATCHPAD MESSAGE. FO ND SHOWED MAP FLAG, VTK, NO ANP/RNP. GROUNDED - YES. PERFORMED B737-800 FIM 34-61 TASK 801 FOUND R FMCS FAILED PREVIOUS FLT LEGS, REPLACED NEW FMCS #2 WITH TRANSFERRED & VERIFIED SOFTWARE, UPDATED PERFORMANCE FACTOR, INSTALLATION TEST GOOD PER B737-800 AMM 34-61-02/401. PER TECH SERVICES REQUEST, REPLACED NEW #1 FMCS TO MATCH #2 FMCS P/N, TRANSFERRED & VERIFIED SOFTWARE, UPDATED PERFORMANCE FACTOR, INSTALLATION TEST GOOD PER AMM 34-61-02/401.