As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF, THE LEFT HAND PROPELLER TENDED TO FEATHER. THE PILOT CONTROLLED THE FAILURE AND MADE AN EMERGENCY LANDING. INVESTIGATION REVEALED THE LOW PITCH SWITCH WAS NOT WORKING AND THERE WAS A WORN CARBON BRUSH IN THE MECHANISM.