As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FMC FAIL. F.O. FMC FAILED THEN RAN QRH. THIS CAUSED DUAL FMC FAILURE. FMC'S BOTH CAME BACK. CONTINUED NORMAL OPS. CAPT'S RNP/AND WAS 10/9.92, GPS L&R O.O. IRS - L 340/1.0. IRS - R 300/1.2. CPDLC WAS LOST. GROUNDED - YES. RESET SYSTEM AND TESTED FMCS 1&2, GROUND FUNCTIONAL ETOPS TEST GOOD IAW B737-800 AMM 34-61-00-710-801 FOR FMCS 1&2.