As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXPERIENCED PROP OVERSPEED NR 2 ENGINE ON SHORT FINAL. ALSO, BETA WARNING HORN ANNOUNCED JUST PRIOR TO TOUCHDOWN (WHISTLE SOUND) WHEN POWER LEVERS ABOVE FLIGHT IDLE. REMOVED & REPLACED NR 2 ENGINE PCU IAW HAMILTON SUNDSTRAND 61-22-00 PG 703-706. ENGINE RUN IAW DHC -8 MM 71-00-00 PG 506-527. OPS AND LEAK CHECK GOOD.