As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ONE OF THE THREE BOLTS ATTACHING THE ENGINE TO THE MAIN GEARBOX WAS DISCOVERED SHEARED DURING A TURN AROUND CHECK. THE BOLT WAS SHEARED ABOUT MIDWAY IN THE THREADED PORTION OF THE BOLT. THE ENGINE WAS REMOVED AND AREA INSPECTED IAW WRITTEN PROCEDURES. NO REASON FOR BOLT DAMAGE WAS DETERMINED.