As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HAS SHEARED TWO SHAFTS ON TWO DIFFERENT ENGINES WITH APPROXIMATELY 30 HOURS WHEN OCCURENCE OCCURED. WE PURCHASED AN OX UNIT FROM THE SAME COMPANY THIS LAST TIME THE FAILURE OCCURED AND LOOKING AT THE PAPERWORK ON SN KK-81 (OX UNIT) IT SUBSEQUENTLY HAS SHEARED TWO DRIVE SHAFT THIS YEAR ON ANOTHER OPERATORS AIRCRAFT. ITS MY BELIEF THAT THERE IS A MATERIAL OR MFG DEFECT WITH THESE NEW DRIVE SHAFTS BEING INSTALLED.