What was found
INTERMITTENT VTK FLAG ON RIGHT SIDE FOLLOWED BY "MAP"FLAG AND FMC RIGHT INOP ON LDV. IT HAPPENED AT CLIMB OUT (15000') AND 2 HRS AFTER T/O. ON DESCENT AT 14000' FO COMMAND SPEED SHOWED 334 KTS FOR APPROX 20 SECVNAV COMMAND SPEED WAS 300 KTS. GROUNDED - YES. REMOVED & REPLACED #2 FMC COMPUTER REF B737-900 AMM 34-61-02, REPOSITIONED FMC TRANSFER SWITCH TO NORMAL, VERIFIED & LOADED CURRENT SOFTWARES, FMCS PERFORMANCE FACTORS ADJUSTED, OPS TEST GOOD REF AMM 34-61-02 400-801.