As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO PILOT EXCEEDING COMMANDED SPEEDS IN VNAV PATH, VNAV SPEED, AND LVL CHG. IT PERFORMS UNCOMMANDED LEVEL OFF AND CLIMBS DURING DESCENT (LVL CHG AND VNAV) AUTO THROTTLES NOT DRIVING CLOSED DURING LVL CHG (THIS IS AN INTERMITTENT PROBLEM).