What was found
TAIL ROTOR PITCH CHANGE HORN CRACKED: VISIBLE FROM THE OTBD FACE OF THE TAIL ROTOR PITCH CHANGE HORN, RUNNING TANGENT FROM THE BOLT HOLE, ALONG THE EDGE THICKNESS, TO THE EDGE OF THE CONICAL INSERT ON THE INBD FACE. WITH THE ROTOR BRAKE SET AND APPLYING FORCE THROUGH THE TAIL ROTOR ASSY IN VARIOUS DIRECTIONS, I COULD SEE THE CRACK OPEN UP SLIGHTLY AND INSERT A .002" FEELER GAUGE. AFTER REMOVING THE TAIL ROTOR BLADE, I NOTICED THE END OF THE INSERT WAS NOT FLUSH WITH THE OTBD FACE OF THE PITCH CHANGE HORN. THE INSERT WAS NOT LOOSE IN THE HOLE AND APPEARS SEATED AGAINST THE INBD FACE.