As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VTK FLAG ON CAPTAIN'S SIDE. RAN CHECKLIST AND RESTORED DUAL FMC OPERATION. VTK FLAG ON CAPTAIN'S SIDE RETURNED DURING LANDING. ACFT GROUNDED. CANNOT DUPLICATE DEFECT ON GROUND. ACCOMPLISHED FMC BITE, IAW FIM 34-21 TASK 801. NO FAULTS FOUND. SYSTEM CHECKED OK.