As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
Auto Pilot twitches in pitch on VG1. Auto Pilot pulls back on controls continuiously when operated on system "A". Corrective action: Removed and replaced Pitch Computer IAW MM 22-11-151A, operatoinal check normal. See A/C 120 Log pages 92743 and 92744. This report is filed closed.