What was found
LEFT FMC FAILED FOR APPROXIMATELY 20 SECONDS. VTK DISPLAYED ON CA ND. LFMC RETURNED TO NORMAL OPERATION. CRUISE FL360 NEAR KCOD. GROUNDED - YES. VERIFIED L/H FMC FAIL PREVIOUS FLTS. R/H FMC RECENTLY REPLACED WITH P/N: 171497-05-01. L/H FMC FAILURES BEGAN AFTER. REPLACED R/H FMC WITH MATCHING P/N 176200-01-01 PER PREFERRED CONFIG REF ASA IPC 34-61-02. 4 EA CBS PULLED/RESET. FMC REPLACEMENT REF AMM 34-61-02. VERFIIED CORRECT SOFTWARE, PERFORMANCE FACTORS. GROUND VERIFICATION SUCCESSFUL. SEAMC ASHRAF.