As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FMC FAILED ENROUTE FOR 2 MINUTES THEN CAME BACK ON LINE ON ITS OWN. GROUNDED - YES. LAST FLIGHT, LT FMC FAULTED "PRES POS LAT RATE" INTERMITTENT FAULT. PERF B737-800 FIM 34-61 TASK 836. 1 EA C/B ON P18-2 OPENED, RESE. LT FMC NOW OPS NML. ETOPS GND VERIFICATION TEST SUCCESSFUL.