As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT FMC FAILURE OCCURRED AT CRUISE. PERFORMED FMC FAIL QRH PROCEDURE. FMC-R DID NOT RECOVER. FMC SOURCE SELECT SWITCH PLACED ON BOTH ON L. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 34-61 TASK 836, RH FMC OPS NML. FMC SOURCE SELECT SWITCHED TO NORMAL.