As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE OPERATION TO REPLACE LIFE LIMITED NON-ROTATING SWASHPLATE ON AIRCRAFT, A SUSPECTED CRACK WAS FOUND ON THE INNER SURFACE OF THE STATIC MAST. THE CRACK APPEARS IN APPROXIMATELY .5000 THE CIRCUMFERENCE OF THE SHAFT. THE STATIC MAST ASSEMBLY OF THE MAIN TRANSMISSION IS TO BE REPLACED WITH A NEW ITEM. PROBABLE CAUSE, UNKNOWN AT THIS TIME.