As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FMC FAILED ENROUTE. RAN QRH PROCEDURE AND THE LEFT FMC DID NOT RECOVER. CONTINUED OPERATIONS UNDER SINGLE FMC OPS WITH RIGHT FMC. GROUNDED - YES. SELECTED FMC OVERHEAD SWITCH TO NORMAL POSITION. ACCOMPLISHED B737-800 FIM 34-61 TASK 836. LEFT FMC OPS NORMAL.