As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, THE CREW WAS GIVEN A HEADING AND DISCOVERED THAT THE FLIGHT DIRECTOR WAS GIVING IMPROPER INDICATIONS. THE CREW DECIDED TO RETURN TO YOW AND CALL MAINTENANCE. MAINTENANCE HAD THE CREW RECYCLE AIRCRAFT POWER. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE. FLIGHT 4190 DEPARTED WITH NO FURTHER INCIDENTS.