As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"VTK" OBSERVED ON FIRST OFFICERS NAV DISPLAY WITH LOSS OF MAP, LNAV AND VNAV. CORRECTED AFTER 90 SECONDS. QRH REFERENCED. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 34-61 TASK 801. FMC-R PGM FAULT LOGGED LAST LEG. ACCOMPLISHED FIM 34-61 TASK 802. OPS TEST NORMAL.