As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS FOUND A TEAR IN ONE OF THE DRIVE V-BELTS. UPON INSPECTION OF THE CLUTCH ASSEMBLY, THE UPPER SHEAVE HAD A SHARP STEP WORN INTO IT. AFTER DISASSEMBLY OF THE SPRAG CLUTCH DAMAGE WAS FOUND ON THE CLUTCH AND ONE OF THE CLUTCH SHAFT BEARINGS.