As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A ROUTINE FLIGHT IT WAS NOTED DURING THE DESCENT AND APPROACH THE CO-PILOT DIRECTIONAL GYRO BECAME UNSERVICEABLE INDICATED BY A FLAG ON THE INSTRUMENT HEAD AND AN INCORRECT HEADING, THE FLIGHT AND LANDING CONTINUED WITHOUT COMPLICATIONS WHEN THE CAPTIAN SLAVED THE SYSTEM TO THE LH SIDE. A LOANER GYRO WAS INSTALLED, THE SYSTEM WAS GROUND FUNCTION CHECKED SERVICEABLE.