As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS REPORTED THAT WHILE ADDING TAKEOFF POWER THE RIGHT ENGINE WENT INTO FEATHER THROUGH APPROXIMATELY 1500 LB OF. TORQUE. MAINTENANCE RIGGED THE RIGHT HAND PROP BETA VALVE AND RIGHT HAND LOW PITCH SOLENOID. REFERENCE MM 76-10-00. OPERATIONAL CHECK WAS GOOD.