As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, TWICE (4 TIMES) F/O FMC DISPLAY WENT BLANK ONLY TO RETURN WITHIN 3 SECONDS WITH NO LOSS OF INFORMATION. REMOVED AND REPLACED FMCS CDU AS PER M/M 34-61-02-422-036. CDU TEST 34-61-02-712-035. CDU OPS CHECK NORMAL.