As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SHORT FINAL, AT 500 FT, LOST ALL NAVIGATIONAL GUIDANCE ON FIRST OFFICER'S SIDE. ALL FLAGS APPEARED. OPENED AND CLOSED NAV CONCENTRATOR AND SYMBOL GENERATOR CIRCUIT BREAKERS, ALL INSTRUMENTS RETURNED TO NORMAL. COULD NOT DUPLICATE DISCREPANCY. ALL EQUIPMENT OPS CHECKED GOOD IAW DC8 MM 34-20-0.