As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(OG5S) DURING UNSCHEDULED MX THE LOWER DRIVE SUPPORT STRUT WAS FOUND TO BE CRACKED 90 PERCENT THROUGH THE TUBE WHERE THE UPPER ATTACH LUG IS WELDED. UPON REMOVAL THE LUG COMPLETELY SEPARATED FROM THE TUBE. IF TUBE HAD SEPARATED DURING FLIGHT LOSS OF MAIN ROTOR TORQUE WOULD HAVE OCCURRED.