What was found
ENROUTE FROM OGG TO PDX, EXPERIENCED LEFT FMC FAILURE. INDICATIONS: VTK ON CA SIDE, BOTH FMC BLANKED, A/T LIMIT AND FLIGHT PLAN DISAPPEARED ON CA ND. LNAV/VNAV DISENGAGED. BEFORE QRH COULD BE ACCOMPLISHED FMC AND FLIGHT PLAN REPOPULATED. CONTINUED FLIGHT W/ NO FURTHER EVENTS. GROUNDED - YES. PER B737-800 FIM 34-61 TASKS 801/807. FMC L& R CURRENT STATUS NO FAULTS. LEFT 1 BOTH SHOW FMC-L FAILED. FMC-L TO CDU-L AND CDU-R. INTERMITTENT.