As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FMC INDICATED FAILURE WITH "VTK" ON CAPTAINS PFD. ACCOMPLISHED QRH AND FMC WAS RESTORED. GROUNDED - YES. PERFORMED LEFT FMC BITE FIM 34-61 TASK 801. FOUND SEVERAL I ACARS - MU BUSY BUFFER FULL. ACCOMPLISHED FIM 34-61 TASK 899. NO ACTIVE FAULTS LOGGED. PERFORMED FMC LEFT OPS TEST REF AMM 34-61-00/501.