As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE SANDEL TAWS/RMI SHOWS SIGNIFICANT BEARING ERRORS ON HEADING GREATER THAN 359 DEGREES OR LESS THAN 0 DEGREES. THIS PROBLEM WAS DISCOVERED IN FLIGHT AND VALIDATED THROUGH GROUND TESTING OF NUMEROUS UNITS. PROBABLE CAUSE OF MALFUNCTION IS SOFTWARE. THE ST34 TAWS/RMI IS NOT RECOMMENDED FOR NAVIGATION AT THIS TIME.