What was found
ON FINAL APPROACH, AND GS INTERCEPT, HAD A LEFT FMC FAILURE INDICATED BY LOSS OF FMC PROMPT, MAP, VTK AND V SPEEDS ON CAPTAINS INSTRUMENT. 45 SECONDS LATER CAPTAIN`S INSTRUMENTS RETURNED AND ALL OF THE FMC FAILURE INDICATIONS MOVED TO FIRST OFFICER`S SIDE. ANOTHER SWITCH BACK TO CAPTAIN`S SIDE HAPPENED BEFORE LANDING. AFTER LANDING, THE INDICATIONS SWITCHED TWO MORE TIMES BEFORE BLOCK IN AND SHUT DOWN. ACFT GROUNDED. IAW AMM 34-61-00-860-801 CONCERNING THE FMC, LANDING, TAXI VTK, AND MAP NUISANCE ERROR A, FLIGHT OPERATIONS NORMAL. NUISANCE CONDITION. BOTH FMCS SHOWED NO IN-FLT FAULTS LAST 10 FLTS. FMC OPERATIONAL TESTED GOOD IAW AMM 34-61-00.