As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MOMENTARY LEFT FMC FAIL (VTK + MAP FLAGS) RAN QRH. CORRECTED ITSELF BEFORE MOVING FMC SELECT SWITCH TO BOTH ON R. FMC-L 075DEG/0.1NM FMC-R 235DEG/0.0 NM IRS-L 356DEG/1.6NM IRS-R 078DEG/0.5NM. GROUNDED - YES. PERF B737-900 FIM 34-61 TASK 801, W/ NO DEFECTS NOTED. ETOPS GND VERIFICATION TEST SUCCESSFUL.