As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 194 - ATB - CREW REPORTED OSCILLATIONS IN TAIL OF AIRCRAFT AND SUSPECTED RUDDER ISSUE. FOLLOWED QRH AND NO HELP. DECISION MADE TO RETURN TO LAX FOR MTC. CORRECTIVE ACTION: MTC PERFORMED YAW DAMP BITE AND NTF. MTC REPLACED RT YAW DAMP COMPUTER AS PRECAUTION AND PERFORMED TESTS 30 AND 40. ALL OPS CHECKS GOOD. LP 5051352