As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE DOING AUTO FEATHER CHECK RT PROPELLER WOULD NOT FEATHER. PROP WOULD FOLLOW POWER LEVER COMMANDS. FEATHER SOLENOID FOUND TO BE THE FAULT. THE COUPLING ASSY OF THE FEATHER SOLENOID CAME UNSCREWED. DUE TO THE FACT THAT IT WAS NO LOCK WIRED COUPLING ASSY SCREWED BACK TOGETHER & LOCK WIRED RIGGING CHECK COMPLETED & FUNCTION CHECKED SERVICEABLE.