As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE KIT CONDITIONER BELT IDLER PULLEY WHICH HOLDS TENSION ON THE COMPRESSOR TO CRANKSHAFT PULLEY BELT. THIS IS THE SECOND OCCURANCE IN WHICH THE BEARINGS IN THIS PULLEY SIEZE AND CAUSE THE PULLEY TO FALL OFF INTO THE COWLING AND ENGINE COMPARTMENT.