As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GSO-DCA - FLT 3269 - ON FINAL APPROACH, THE NR 1 PROP RPM DECAYED TO 780, COULD NOT CONTROL WITH CONDITION LEVER OR POWER LEVER. CAPTAIN SHUT ENGINE DOWN AND DECLARED AN EMERGENCY. ACFT LANDED WITHOUT INCIDENT. REMOVED AND REPLACED NR 1 PROP CONTROL UNIT.