As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LANDING, THE RIGHT PROP ATTEMPTED TO FEATHER WITH THE AUTO FEATHER SYSTEM ON (AS THROTTLES WERE PULLED BACK FOR LANDING). PILOT SECURED THE AUTO FEATHER SYSTEM AND LANDED SAFELY. LOGBOOK ENTRY MADE AND TURNED AIRCRAFT OVER TO MAINT. ADJUSTED AUTO FEATHER POWER SWITCHES TO APPROX. 90% FOR BOTH L AND R ENGINE. AUTO FEATHER SYSTEM FUNCTIONS NORMALLY.