As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THROUGH 8000 FEET, THE AIRCRAFT WOULD YAW LEFT AND RIGHT. COMPLIED WITH COM PROCEDURES AND YAW ACTION STOPPED WHEN MANUAL RUDDER WAS SELECTED. AIRCRAFT RETURNED TO A NORMAL LANDING AT CLT. MAINTENANCE REPLACED THE RUDDER POWER PACKAGE. AIRCRAFT RETURNED TO SERVICE.