As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE PILOT ELECTED TO SHUT THE NR 1 ENGINE DOWN DUE TO A PROPELLER OVERSPEED INDICATION. THE EMU DATA DOWNLOAD CONFIRMED THE OVERSPEED WITHIN ACCEPTABLE TOLERANCES FOR THE PROPELLER AND CONTROL SYSTEM. THE INVESTIGATION IS ONGOING TO DETERMINE THE ROOT CAUSE OF THE OVERSPEED.