As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ENGINE WAS DISASSEMBLED BECAUSE OF A REPORTED VIBRATION. A CRACK WAS DISCOVERED THAT ORGINATED FROM THE CURVIC COUPLING END OF THE SHAFT, MEASURING APPROX 5.5 INCHES AND EXTENDING APPROX 300 DEGREES AROUND THE SHAFT. REPAIR STATIONW/O A105779. ENGINE TOTAL TIME AND CYCLES ARE UNKNOWN.