As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH FMC'S MOMENTARILY FAILED DURING CRUISE. FMC'S RESET BEFORE QRH COULD BE COMPLETED. OPERATIONS NORMAL AFTERWARDS. GROUNDED - YES. NO ACTIVE FAULTS OR LATCHED MESSAGES FOUND. PERFORMED FMCS OPERATIONAL TEST REF B737-9 AMM 34-61-00. FMCS OP CHECK GOOD. ALSO PERFORMED OPERATIONAL TEST OF CMU REF AMM 23-27-00, OP CHECK GOOD. NO DEFECTS NOTED.