As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND WIRE IN LT MAG CHAFED TO GROUND WHICH CAUSED THE ENGINE TACH TO SHOW AT OVERSPEED, THE GOVERNOR TRIED TO SLOW THE ENGINE DOWN WHICH CAUSED THE LOW ROTOR RPM HORN TO SOUND. WITH THE CHANGE IN POWER SETTING THE CLUTCH LIGHT CAME ON SHOWING THAT THE BELT WAS BEING RETENTIONED. (K)