As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT DURING CLIMBOUT OF IAD, RECEIVED A RUDDER 1 & 2 SYSTEM INOP MESSAGE ON THE EICAS. MAINTENANCE PERFORMED TROUBLESHOOTING IN ACCORDANCE WITH THE FIM AND FOUND THE CONDITION TO BE A TRANSITORY CONDITION. THE RUDDER SYSTEM FUNCTIONED NORMALLY.