As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FMC FAILED ON TWO SEPARATE OCCASIONS WHILE AT CRUISE ALTITUDE. ACCOMPLISHED THE FMC FAIL QRH AND FMC RECOVERED AFTER ABOUT TWO MINUTES ON BOTH OCCASIONS. GROUNDED - YES. PERFORMED B737-900 FIM 34-61-TASK 836 (OPS RESET) SYSTEM OPS CHECK NORMAL.