As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VTK FLAG ILLUMINATED ON FO MCDU MAP DISPLAY. OCCURS INTERMITTENTLY ON V PATH CHANGE (LEVEL OFF AND INITIAL DESCENT) THEN RESTORES ITSELF WITHIN 30-60 SECONDS. GROUNDED - YES. REMOVED AND REPLACED RT FMC REF AMM 34-61-02, OPS CHECK NORMAL.