As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OPERATOR EXPERIENCED AN IN-FLIGHT FEATHERING OF THE LEFT ENGINE AND IMMEDIA TELY SHUT DOWN. UPON INVESTIGATION, IT WAS REVEALED THE CAMSHAFT HAD BROKEN AT THE PROPELLER GOVERNOR DRIVE END. CAUSE UNKNOWN, UNIT SENT TO FACTORY FOR INSPECTION.