What was found
WHEN CONDITION LEVER ADVANCED TO MAX, THE PROPELLER UNIT WENT TO AN OVERSPEED CONDITION. REPLACED THE ENGINE ELECTRONIC CONTROL UNIT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHEN CONDITION LEVER ADVANCED TO MAX, THE PROPELLER UNIT WENT TO AN OVERSPEED CONDITION. REPLACED THE ENGINE ELECTRONIC CONTROL UNIT.