As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHANNEL A AND B WHEN ENGAGING AUTOPILOT A LARGE CONTROL BUMP. ALL OTHER AUTOPILOT FUNCTIONS NORMAL. ACFT GROUNDED. PERFORMED PREV FLIGHT FAULT REVIEW, CURRENT STATUS & DFCS LAND VERIFY TEST ALL IAW AMM 22-11-00. ALL OPS NORMAL, NO DEFECTS NOTED. A/P A & B BOTH ENGAGE AND OPERATE SMOOTHLY. NO HISTORY CHAPTERS 22 & 27 LAST 30 DAYS. ETOPS SIGNIFICENT SYS GROUND VERIFICATION SUCCESSFUL.