As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AS WE LOST A/S THE RUDDER STARTED PULSING LT & RT. NO RUDDER LIMIT LIGHTS ILLUMINATED. IT DAMPED AS WE SLOWED & DESCENDED. NR 2 YAW DAMPER WAS ENGAGED. WE HAD KICKED AUTOPILOT OFF AT THIS POINT, SIGNIFICANT YAWING LT & RT. PRECAUTIONARY R & R NR 2 FAC IAW MM 22-26-34-04 & NR 2 FLC IAW MM 27-23-26-04. AFS LAND TEST OPERATIONAL CHECKS NORMAL.