As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 RIGHT CDU SCREEN WENT BLANK ONE HOUR INTO FLIGHT. RECYCLED CIRCUIT BREAKER E29. DISPLAY RETURNED FOR APPROX 45 MINUTES THEN FAILED AGAIN. AIRCRAFT RETURNED TO JFK. REMOVED AND REPLACED RIGHT FMS CDU PER M/M 34-61-02. OP CHECKS GOOD AT THIS TIME.