As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A WALK AROUND INSPECTION THE TECHNICIAN NOTICED THAT THE ROCKER ARM ASSEMBLY ON THE TAIL ROTOR HUB ASSEMBLY WAS VERY LOOSE. FURTHER INVESTIGATION REVEALED THAT THE BEARING HAD BECOME LOOSE IN THE ROCKER ARM ASSEMBLY. IN THIS APPLICATION THE BEARING IS ROLL STAKED INTO THE ROCKER ARM ASSEMBLY. THE ROLL STAKING HAD FAILED LETTING THE BEARING COME LOOSE IN THE BORE OF THE ROCKER ARM ASSEMBLY. SUSPECT PROBABLE CAUSE IS FAILED ROLL STAKING.