As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS REPORTED SMOKE IN COCKPIT AND CLOSED PRSOV VALVE STOPPING THE SMOKE. SEVERAL MINUTES LATER, THE PILOTS NOTICED TORQUE AND OIL PRESSURE FLUCTUATING. FEATHERED AND SHUT DOWN ENGINE AND LANDED WITHOUT INCIDENCE. ENGINE WAS LEAKING OIL FROM THE COMPRESSOR SEAL.