As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, PILOT REPORTED A LOUD THUMP, THE CLUTCH LIGHT ILLUMINATED AND WOULD NOT GO OUT. INVESTIGATION FOUND THAT ALL 8 RIVETS ATTACHING THE LOWER ACTUATOR BEARING BRACKETS, TO THE FAN SCROLLS HAD SHEARED, ALLOWING THE LOWER ACTUATOR BRG TO COCK TO THE SIDE AND LOSE SOME TENSION ON THE DRIVE BELTS.