As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A YAW KICK WAS FELT IN-FLIGHT. THE KICK WAS ISOLATED TO THE NR 2 AFCS SYSTEM. SUBSEQUENT TROUBLESHOOTING REVEALED THE PROBLEM TO BE THE NR 2 AFCS COMPUTER CAUSING THE YAW KICK. A SECOND SPARE COMPUTER WAS INSTALLED IN NR 2 POSITION AND THE SAME PROBLEM WAS THERE. ALSO, A LARGE ENGAGEMENT ERROR WAS NOTICED WHEN TURNING THE SYSTEM ON AND OFF. FINALLY, REPLACED THE NR 1 AFCS COMPUTER FOR TROUBLESHOOTING AND THE PROBLEM WAS GONE. (X)