As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE CAPT FMC FAILED TWICE. RAN QRH AND CAPT FMC RETURNED TO NORMAL OPERATIONS ON BOTH OCCASIONS. GROUNDED - YES. ACCOMPLISHED LEFT FMC BITE B737-900 FIM 34-61 TASK 801. LEFT FMC INFLT FAULTS DOES NOT SHOW ANY FAULTS LOGGED. DUE TO PILOT REPORT, REMOVED/REPLACED FMC COMPUTER REF B737-900 AMM 34-61-02. PERFORMED SYS OPS TEST AND SYS CKS NML.