As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO PILOT AND YAW DAMPER DISENGAGED ON THEIR OWN IN FLIGHT ON APPROACH. YELLOW AP FAIL AND YD FAIL CAS MESSAGES ON BOTH PFDS. THIS WAS DUE TO SPEED BRAKES RETRACTING ON THEIR OWN. REMOVED AND REPLACED SPOILER SURFACE POSITON UNIT. CHECKS GOOD ON GROUND AT THIS TIME.