As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VTK MESSAGE AND FMC FAILURE ON CAPTAIN SIDE. GROUNDED - YES. PERFORMED B737-800 FIM 34-61 TASK 801 FMCS BITE PROCEDURE AND FMC-L PGM FAULT LOGGED AS INTERMITTENT @ 0434Z. PERFORMED FIM 34-61 TASK 807 AND DETERMINED LEFT FMC COULD NOT EXECUTE A SOFTWARE INSTRUCTION AND RECOVERED FROM THIS FAULT. LEFT FMC OP CHECKS NORMAL AT THIS TIME FIM DIRECTS NO FURTHER ACTION REQUIRED, OK FOR SERVICE.