As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FILGHT 4182, RETURNED TO GATE. DURING PUSHBACK AND RIGHT ENGINE START THE FOLLOWING STATUS MESSAGES APPEARED, -RUD LIMIT FAULT-, -SPOILER/STAB FAULT-, -STEERING DEGRADE-, -DCU 1 AURAL FAULT- AND THE EICAS WENT BLANK MOMENTARLY. MAINTENANCE REPLACED DCU NR 1. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.