As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FL 340 LEFT FMC FAILED. GROUNDED - YES. CYCLED FMC 1 C/B. FMC L HAD AN INTERMITTENT FAULT LEG 1. NO CURRENT FAULTS. SENSOR PAGE CHECKS GOOD. PER B737-900 FIM 34-61 TASK 801, INTERMITTENT FAULT. AIRCRAFT GOOD FOR SERVICE. REF B737-900 AMM 20-60-01.