As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED THAT FLIGHT DIRECTOR WOULD NOT DISENGAGE AT 250 QFE ON APPROACH DESPITE SEVERAL ATTEMPTS. AT APPROXIMATELY 150 QFE, YAW DAMPER SWITCHED LEFT TO RIGHT AND AT 80 QFE, AUTOPILOT WAS REPORTED TO ENGAGE UNCOMMANDED. FIRST OFFICER DISENGAGED AUTOPILOT ON CONTROL PANEL AND AIRCRAFT LANDED OK.