As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AT CRUISE FL350, DISPLAY OF VTK AND MAP ON CAPTAIN'S SIDE WITH LOSS OF VNAV AND LNAV. QRH PROCEDURES FOR LEFT FMC FAILURE PERFORMED. ACFT GROUNDED. FOUND NR 1 FMC FAILED. R & R NR 1 FMC REF AMM 34-61-02, CHECKS GOOD. INSTALLED REQUIRED SOFTWARE BY CROSSLOAD FROM NR 2 FMC. NR 1 FMC, OPS CHECKS GOOD/SOFTWARE CONF CHECK GOOD.