As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS ITEM IS INSTALLED ON A CESSNA T337G THAT HAS HAD TCM TSIO-520 ENGINES INSTALLED AS AN STC MODIFICATION. THE PART IS A BALL-TYPE SWIVEL THAT CONNECTS THE MIXTURE CABLE TO THE MIXTURE CONTROL ARM. THE BALL HAS PULLED OUT OF ITS SWAGED HOUSING. THIS IS THE THIRD SUCH FAILURE IN 177 HOURS.