As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE CREW REPORTED THE NR 2 DISPLAY UNIT WENT BLANK. AFTER SEVERAL ATTEMPTS AT CYCLING THE CIRCUIT BREAKER, THE CREW PERFORMED AND AIR-TURN-BACK. MAINTENANCE REPLACED NR 2 DU. OPS CHECKS GOOD THE AC WAS RETURNED TO SERVICE. (K)