As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FMC FAILED MOMENTARILY AT CRUISE ALTITUDE OPERATION RESTORED IN APPROXIMATELY 30-60 SECONDS. GROUNDED - YES. ACCOMPLISHED FMC BITE, PRES POS LAT RATE FAULT ON LAST LEG LOGGED. ACCOMPLISHED B737-900 FIM 34-61 TASK 824 BOTH ADIRUS NO CURRENT FAULTS AND NO FAULT HISTORY. ALL SENSORS FOR BOTH FMC'S TEST GOOD REF FIM 34-61 TASK 801.